What use cases of "proper server management" does fucking with my resolv.conf(5) solve?
If I have a laptop I can perhaps see updating values per DHCP or IPv6 RAs, but once I set up a server up why the hell is it a link to /run? (I once had to use chattr +i because of brain dead "cleverness".)
In over thirty years of running Unix-y systems I never needed my resolv.conf "managed", so I have no idea why Ubuntu (for one) defaults to fiddling with it.