I have run Redhat, Fedora and Arch servers. HAnds down arch wins for a server setup.
Change happens - always. Wigth Arch the changes are fed to me in small chunks - I get to deal with one change at a time (e.g. changing to systemd) Any given change might be smaller or larger but with Arch I can focus on dealing with that single change.
With non-rolling releases, every couple of years (or 6 - 9 months for Fedora) I have to do a fresh install containing all the changes.
Rolling release model is far superior - and as others have pointed out Arch stays close to upstream and you can keep your systems current which of course means fewer exploit opportunities for the bad guys.
gene