I'd like to point out that Guix is closer to ~52,000 packages than the ~29,000, as we maintain a bunch of things in separate channels that nixpkgs includes in its monorepo (e.g. the 20+k CRAN packages). See https://hpc.guix.info/channels and https://hpc.guix.info/channels/non-free for some popular channels used by HPC folks.
Huh. I think that info should be more prominently displayed.
Just a few minutes ago, I decided to put off trying guix until later because it had fewer packages than nix, and was missing several that I need, that nix has.
Guix even comes with a Nix service[0] which is easy to enable if you would like to also use Nix packages.
[0] https://guix.gnu.org/manual/en/html_node/Miscellaneous-Servi...
Nix also has a Guix service itself[^1], if you want to do the same in reverse ;)
I love that this goes both ways. What other pair of Linux distros mutually offer first class support for using each other's package managers alongside their own??
It's a cute little testament to the fundamental strengths of the functional package management paradigm, as well as helping users on either side of the fence fill some gaps in a pinch and providing more/easier opportunities to compare notes and inspire improvements.
NixOS has approximately the same advantages, but a many times larger package repository. Take a look at that, it might already have your packages.