Tahoe introduced some changes to the windowing code that badly disrupted my DisplayPort device that was rock solid on Sequoia. I ended up switching to a new device as a workaround. Window memory use (I have a lot of virtual desktops and extra screens) is much higher and there's a peristent bug where taking a screenshot with CleanShot somehow resets the DisplayPort driver and everything flips out for a minute and it has to rediscover the external monitors. Infuriating.