Gregory's Server> This assumption means that the only way to implement readiness notification management in systemd is to have a central supervisor for all the services, which is the exact opposite of modularity.
Just set NOTIFY_SOCKET to the socket implementing the trivial protocol, which can be named at random? There is no reason this protocol is at all incompatible with multiple decentralized managers? You just run a socket on each?
I can't understand the problem here.