Maybe I should have said more precisely "it's not necessary to save the rest of the world at once". I think it comes down to something like the second law of motion: F = ma. There's no reason you couldn't move the whole world, it's just a trade-off between time, distance, and force. I think a lot of people get stuck thinking they have to change everybody before they can get moving, or that the idea isn't a success unless it "wins", but neither is true.

New ideas rarely displace old ones. It seems like it in computing, because the space has grown so rapidly, but I would almost wager that most language and platforms are used at least as much now as they were at their peaks, just because there are so many more computers and developers now than there used to be. From that perspective, new ideas don't defeat old ones, they just capture more of the new frontiers. As new companies are founded, and new developers graduate from college, they adopt new technologies while the old teams general stick with what they started with. Sometimes they fail or reorganize, but many times they persist with their old systems.

We could be disheartened by that realization (Cobol and TCL never died...), but I think with the right perspective it can bring more hope. Lisp hasn't actually been destroyed, it just got outpaced - there are probably more people using more variants of Lisp now than at any point in history. As such, we don't have to be disappointed when we don't convince people to switch to our model - it was foolish to expect that in the first place - instead, we can look forward to whatever positive benefit our work does bring to those who adopt it.

> This argument is akin to saying one can survive a pandemic without saving or changing the rest of the world. It's only true if you don't take costs into account. It's far cheaper to stay immune in the presence of herd immunity than without.

To address your counter-argument more specifically, I don't think the analogy is appropriate. The pandemic analogy may be very apropos to our current global crisis, but doesn't describe how ideas work. People don't get "infected" by bad ideas in the same way they are by viruses; they learn and adopt ideas intelligently. We don't have to worry about maintaining our immunity as a small community.

However, other aspects of the community model are more appropriate. If we don't reach critical mass, or have clear motivations and objectives, we'll eventually dissipate and move on to other things. See: the arc language community. Everyone doubtless benefited from the experience, but the outcome wasn't a future in which all of us use Arc as our primary language. So yes, we should invest in community and growth, but that's not the same thing as trying to save the world.

Also, there are economies of scale that come with larger communities, that I think aligns with your reference to "cost" much better. In a small community with an early-stage technology, everyone has to build things from scratch before they can use them. Larger, better established communities benefit from the work of those that came before. No argument there. But that's not really an argument for or against "saving the world" either. It would almost be a category error to observe the advantages of being an established project and say that new one needs to adopt the strategy of "being established".

> Over-engineering has a way of compounding. It's only obvious that something is unnecessary for a brief window of time. Then people start using it, and it starts becoming load-bearing. Compounding efforts to unwind past decisions quickly multiply until they exceed individual limits of effort.

Again, I think this is focusing on the existing mountains and edifices and forgetting we can just go around them. It would indeed be a pain to redesign x86, given that it's main advantage is that it is x86. But instead some people developed RISC-V. Also, I don't think it's true something will only be obviously unnecessary at the beginning, and seem more essential later; the fact we're having these discussions (and things like the UNIX Hater's Handbook) attest that people are quite capable of seeing faults and imagining alternatives. Unwinding decisions exceeds individual capacity only if you're trying to rebase the rest of the stack onto your changes. That is, only if you try to save the world, which is begging the question.

> Even within an individual's limits, I care very much about people being able to make changes to their computers without devoting their lives to the endeavor. We all should have lives outside computers. We should be able to modify our compilers without spending years understanding them. Just by poking and tinkering and getting feedback for an hour here and there.

I admire that objective, and am also addressing that issue in the system I'm currently designing. Imagine being aware of any changes someone made to their own copy of an application without requiring them to submit a pull request, and merging it in if you like the work. No need to track forks or use github pages, the development tools themselves track relevant changes that other people are making to the same codebase. That way, the first time anyone finds and solves a bug, everyone else benefits. And you don't have to worry about your local installation and the upstream repository getting out of sync if you make a personal modification; they aren't treated any differently. I think that would boost open-source development productivity immensely. Such is what I am trying to design.

> Nobody should have to go through what I've been through.

Thanks for your efforts. And now that you've done them, I don't think anyone will have to. They might want to change something, but it will hopefully be much easier to build on your work than it was for you to do it in the first place.

> At the very least we need some critical mass of people to care about implementation complexity. One lone voice seems really fragile, because tiny embers of light can get put out from many sources of bad luck, no matter how lofty their intentions.

I was only using the analogy with pandemics to point out that there are situations where secondary consequences exist, even if it superficially seems like one can go one's own way. I didn't intend to suggest Mu provides any sort of immunity to anything.

> Unwinding decisions exceeds individual capacity only if you're trying to rebase the rest of the stack onto your changes. That is, only if you try to save the world, which is begging the question.

I think I'm losing the thread of this particular back and forth. Perhaps we're saying the same thing, and you took papering over vs replacing to be more mutually exclusive than I intended. I think it's existential for replacing to take some mindshare away from papering over, because of the overwhelming tendency for everyone around us to go the other way. Once you start talking about not having to rebase the rest of the stack, I feel like you're in my replacing camp. Functional replacement rather than sub-system replacement.

> And now that you've done them, I don't think anyone will have to. They might want to change something, but it will hopefully be much easier to build on your work than it was for you to do it in the first place.

This particular back-and-forth was that I said we "don't need to save the whole world", and you "absolutely disagreed". It sounds like you've agreed with all of my points or softened yours, so I'm not really sure where that leaves us.

> > It is not necessary to save or change the rest of the world.

> I absolutely disagree.