These comments really speak to me as someone who is comfortable in Arch but mildly interested in NixOS. The concept seems great, and it seems to work very smoothly when it works. Yet there are always these war stories where people have had to fight the system, to debug some misbehaving hack that is nonetheless required to smash a particular package into the NixOS mould. It is discouraging. The idea I get is that NixOS involves more time doing OS curation chores than does Arch, which already hits the limit of my willingness.
Flakes are another issue. The pre-flakes way seems to be de-facto deprecated, yet the new, flaky way is experimental. I don’t want to waste time learning a doomed paradigm, and I don’t want to depend on anything experimental.
For me, configuration files in git plus btrfs snapshots is just so straightforward. I want to see NixOS as a better way, but I can’t.