[VTimofeenko]

AFAIR, outside AUR Arch is not source-based, so I would imagine it's ability to help with building packages is on par with other binary distros.

No experience with Guix, but its ideas sound very interesting.

[igneo676]

Sure, most of the ecosystem delivers binaries but you can build your own stuff with ABS[1] or download a PKGBUILD from the AUR

[1]: https://wiki.archlinux.org/title/Arch_Build_System