Yup, this. I think a big part of this is that Eelco is really only interested in NixOS. Nix is a large community and there are plenty of people that do care abo

Yup, this. I think a big part of this is that Eelco is really only interested in NixOS. Nix is a large community and there are plenty of people that do care about other platforms, so these things do tend to get sorted out. Still, the core devs will choose to avoid short-term, medium-painful transitions for NixOS even at the expense of killing all the other platforms.