I know. I was speaking about the broader part of macOS, and of replacing the desktop environment.
Specifically I need to know how to prevent the default desktop environment with all the parts I mentioned from launching on log in.
WindowManager on macOS is started by launchd at least. Don’t know how intertwined the desktop environment as a whole is.
But yeah, how to prevent the stuff I mentioned from running, and then what I need to implement in my own DE so that I can have my own working DE on my MacBook Air where I can still run all of the applications that I have installed such as CLion, Photoshop, etc.
What KDE does is not of interest to me in this context. That being said I run KDE neon on my desktop so it’s not like I have anything against it. In fact I like it a lot. But it’s not relevant to what I am talking about here.
It is almost certainly /possible/, but most people in a position to do so haven't thought it was worth the amount of effort involved.