Comment 19 for bug 1744072

ifup/down hooks are undirected (just chronyc offline/online).
There are networkmanager dispatchers which are smarter.

All of this is to allow to handle lossy/changing connections which is far more a laptop or similar (=>NetworkManager) than a server.

We might consider moving on without a solution.
Cyphermox mentioned he will look to provide a solution to hook into events again at some point (Part of the netplan transition) that is based on netlink events I think.

If all but the hooks are complete we can still move on IMHO.