Linux

For sure! I don’t think we’re actually in disagreement at all, just the limits of text communication :). NixOS is certainly less important to me and I don’t really care if people use it or not at all (it’s nice but there’s enough differences that you have to be aware of that it’d be frustrating to some people — even if ultimately those differences are something that can be worked around… If you’re well versed in nix and Linux NixOS is kind of a no brainer, though). Nix for development (or something like it) is legitimately enough of a game changer to warrant some of the evangelism in my opinion, particularly since as you mention it’s pretty much free to try on any (non-windows) system, and adding nix to a project doesn’t harm non-nix users (more than they’re already harmed anyway, haha). I’ll admit that I worry about how “nix ugly and unintuitive” seems to be a huge problem for adoption, and frankly I don’t blame people for bouncing off of nix (I bounced off of nix in 2011 or so and didn’t come back to it for like 10 years — though it was a bit of a brain worm nagging at me the whole time). That said I think the impression people have of nix being this horrible and completely ugly language (an impression I’ve had in the past as well) is also somewhat untrue. The nix language itself isn’t so bad, but the expectation is for it to just be yaml because “I just want to list dependencies”, which is fair and it might be nice if we had some better abstractions to make that more clear. All of the phases in a nix derivation are confusing and poorly documented, and some operations on attribute sets should probably just have nice special syntax instead of these fancy update fixpoints that the average developer isn’t going to understand… ultimately I’m a little unclear on how much of this is “the nix language sucks and needs to be thrown out” and how much is “we really need a better introduction to what this is and how to use it, especially with some beginner examples and best practices for different languages”. I worry a bit about non-nix nix package managers just from the perspective that it’s really nice to have the one tool to rule all development environments, but maybe fragmentation won’t be a huge problem.