What I mean here is that default installs normally don't involve installing a local DNS server, except perhaps as a caching resolver. The caching resolver use case is covered by spawning dnsmasq from NetworkManager; the local DNS server isn't. We do think that there is relatively few such installs of a server that depends on NetworkManager running; and that's definitely not the default setup for Ubuntu Server (where NetworkManager isn't installed by default).
What I mean here is that default installs normally don't involve installing a local DNS server, except perhaps as a caching resolver. The caching resolver use case is covered by spawning dnsmasq from NetworkManager; the local DNS server isn't. We do think that there is relatively few such installs of a server that depends on NetworkManager running; and that's definitely not the default setup for Ubuntu Server (where NetworkManager isn't installed by default).