[teekert]

Main advantage I see above Ubuntu would be the Arch User Repo (AUR) which contains almost all software you can think of. Although that can change when Snap picks up speed. Snapd is also available under Arch though. Moreover, Arch will be much more current in general.

[alfalfasprout]

aur is amazing. For a desktop distro, it's what makes Arch one of the best choices IMO. Want <insert package>? You can compile from source and get something your package manager can track. Not to mention never needing to reinstall for a new version.

I love RHEL/CentOS dearly for servers, but needing to write a complex spec file and deal with the rpmbuild system just to get an RPM for a library is a pain. You end up with /usr/local full of stuff that's hard to update.