Comment 14 for bug 1918141

For nfs-server and the risk of applying the fix to stable releases, this is my take:

It won't break anything unless you've done something truly esoteric, and then you're on your own anyway IMHO.

It will enable nfs-server to consistently start in configurations using static addressing, which is NOT esoteric or strange IMHO, regardless of the startup time of your NIC/switchport/etc. It will make startup consistent, which is currently not the case if your NIC is just slow enough to start to sometime trigger name resolve failures depending on how lucky you were when rebooting the machine.

The current behavior is unwanted, and while the fix was present in Ubuntu once upon a time (pre-systemd releases and wily I think), it has since gone missing so this is really a regression that's lingered longer than necessary.