One thing that dawned on me… maybe CSD and some of the “new” window management paradigms (tiling, card style, etc.) are symbiotic. If you aren’t using the title bar for manipulating the window on a regular basis, you feel free to ignore or outright scramble it.

It creates a clear heirarchy of information too. The system owns the title bar, so any operations there are system operations.

At one point browsers did something similar for security awareness-- real permission prompts, etc. were set a few pixels over into the main UI to establist that they were “real” and not part of the page content.

Most of the time, we’re not so starved for pixels that we have tp be stealing from the title bar.

Hell, we lived thtough 640x480 desktops without even the cheat of hamburger menus.