There have been glaring bugs/issues lasting ages in both MacOS and iOS. For years apple mail on iOS would always show 1 unread message in "all mail" for gmail. On my iPhone 11 pro (and the 6S i had before it) the camera app will sometimes only show a black screen and a freaking reboot is needed to get it working again. I've missed out on many moments with my toddler because of that. Multi-monitor support was so good…
We had to abandon ARD so I don't know if they actually fixed it, but the price is still $80, and at no point has Apple ever lowered that price, even when it was unusable.