What I mean is that I have made a lot of sticky notes in Stickies, and as you know, every note is a separate window. With Mission Control (a-la old Exposé) you can view all currently opened windows and it worked without a hitch in old and "antiquated" macOSes. Watch what happens in Mojave and the recording even doesn't show all annoyances because of the 60FPS quality. Opening to the Mission control view and exiting it stutters and chokes. As soon as I enter the mode I can't exit it with the "swipe with four fingers down" gesture which had never let me down.
WindowServer is Mr. Bad Guy of this OS.
WindowServer is Mr. Bad Guy of this OS.