I found the Lost city!

https://florisse.nl/shield-downgrade/

I seem to recall Apple going through a phase when they put both arrows on both sides of the scrollbar.

Lol… when it literally takes an act of congress to stop the most widely known and discussed perverse incentive.

NGL, i kinda want to see this…

It works in three-dimensional space…

My understanding is that sign languages are far less ambiguous than natural languages, so i suspect there would be far fewer.