Doesn't work on Guix, or at least isn't in the repos and didn't work at all some time ago. Something to do with the way Plasma expects the files stem to be versus how Guix implements it. Nix makes it work so it must be possible, not sure whether anyone's bothered to port it over yet though.

It is. The other person is confusing it with Solaris, which is a Unix derivative based on a mix of System V Unix and BSD.

Solus is a Linux distro. You're thinking of Solaris.

I tend to use either Newsboat or Elfeed. The first one is command line, the second is Emacs. So they're both text-based. Might not be precisely what you're looking for, but with the right choice of terminal font and easy-on-the-eyes colours, I find it a pleasant reading experience without distraction.

The Church of Emacs, specifically.

Not sure which change logs you're looking at, but both stable and current were updated yesterday. Current is most days, stable is usually a couple of security patches and bug fixes a week.