My personal wish is a compromise -- there should be a universal button that we designate as the "SHOW ME WHAT I CAN DO" button.

It would show scrollbars, enumerate every shortcut, hilight everything clickable, indicate everything draggable, indicate everything right-clickable, etc.

Then perhaps an OS-setting to keep it permanently active.

Both Mac and especially newer windows has a huge number of weird hidden shortcut options that I still haven't learned after 5-10 years.

Same with phones, weird things like holding the spacebar on the IOS keyboard to scroll through your prior typed text.