NixOS by far has the most momentum right now.
Just check the non-unique package counts:
https://repology.org/repositories/statistics/nonunique
More than 80K packages that exist in other distros, more than all of packages in AUR combined with 90%+ being the newest version in unstable
And you can run unstable without an issue since you can downgrade individual packages whenever
I discovered they have a Matrix server where people will literally debug your config for you and help you solve issues. But you are right, if you try doing it yourself without help you’ll be pulling your hair out