Dunno about the others but Pottering has proven himself to deliver software against the grain.
LP is the Thomas Midgley Jr of Computer Science.
I thought he had proven that he leaves before the project is complete and functioning according to all the promises made.
You think?
It took us nearly a decade and a half to unfuck the pulseaudio situation and finally arrive at a simple solution (pipewire).
SystemD has a lot more people refining it down but a clean (under the hood) implementation probably won't be witnessed in my lifetime.