I see these kind of posts like using Gentoo, cool that some people are having fun, not for me, using computers the mid-80's I have better yaks to shave.

I am critical as with any technology (see my comment about Nix in another thread here), but Nix is profoundly not using computers the mid-80's way. It is more future technology, where a system is immutable, fully declaratively defined, has atomic updates/rollback, etc. It's the direction things are going, see e.g. macOS sealed system volumes, Fedora Silverblue, etc. It's just that it still has a very large number of sharp edges, not so great documentation, lack of static typing, etc.

Nix may not be the tech that replaces everything, but at the very least it is and has been an important exploration vehicle for declarative configuration, immutable systems, etc.