networkd, NetworkManager, etc. all integrate into the network-online.target in exactly the same way. There is no favouritism for networkd in particular. And an

networkd, NetworkManager, etc. all integrate into the network-online.target in exactly the same way. There is no favouritism for networkd in particular. And anyway, the network-online.target mechanism always seemed like a hack added to placate the people who insist that it exist rather then fix their software to not couple tightly into the concept of "the" network being "online". ;)