[eliaspro]

Well, with systems that's actually the case. It's suite of mostly loosely coupled tools and services and you totally can swap out or disable many of the components however you like. They mostly just use DBus and/or Varlink for IPC and use some common shared libraries to prevent code duplication across the whole project.

[mqus]

well, no? Systemd actually also delivered all of the implementations of those protocols and barely no one cared to fit their previous solution to their standards? Rather, it was the opposite, systemd could also run your usual service shell scripts for a while.

Sure, there are similarities in the sense that you started out with 0 service files at the beginning and no GUI toolkit implemented the Wayland protocol from the start, but the thing itself is pretty different. Systemd wasn't designed by committee (and many people still have gripes about this). Wayland kinda is.