"Virtual Wall" as cliff sensor switch?

[Customer]

Hmm. Carver just posted a video of some guys flying a cheap robot vac. Toward the beginning they do the tape trick and it works fine, causing the vacuum to tumble down the stairs it avoided before.

Wyze Robot Vacuum Slope (Incline/Decline Degree) Limits

My wife said she expects I’m going to eventually do a modification like this: [A Roomba that CAN FLY!] That would be a cool routine. Set up something so when it detects a ledge/cliff, it pauses the vacuum, and another routine flies it safely down the stairs/ledge, then resumes the vacuum. It actually might not be insanely difficult to do, the problem would be designing it in a way that the propellers don’t interfere with the side brushes cleaning along the edges, or blocking the …