It's not though, few server usecases allow/require your environment to change every day.
OpenSUSE Tumbleweed is a lot more stable than ArchLinux for that kind of stuff though. It stages updates in tested snapshots. ArchLinux updates just error if you time them right.
Anecdotal, but I never had an Arch install fail after updating (maybe the one time my EFI partition was full, but not specific to Arch). While I have a laptop running OpenSUSE Tumbleweed that failed to start after the third update I did on it.