USB-C randomly marks ports tainted so specific devices won't work until reboot.
Reattach to USB-C hubbed ethernet fails, no clear path to force reset alive. Random plug unplugs sometimes work.
Bluetooth loses connectivity to Apple kbd and magic pad.
Gui can't remember screen to desktop placement across plug unplug replug of screen.
Tail console. Unbelievably chatty error log streams from many subsystems hunting for optional elements and different models behaviour. We're now running legacy code depending on compatibility ABI support in many cases.
Btw I still love my mac.