Life's dangerous.

Roughly 30k cycles is typical. You can certainly design a spring to have infinite life. But it requires reducing average deflection, aka more spring with less deflection per turn.

People think garage door springs are like diffusing a bomb. It's not that bad if you are competent and have the correct equipment.

This is a wild proposition. Were taxis running directly after 9/11?

This is sort of a problem if a society depends on them as a piece of critical infrastructure. If a city owns a bus route and needs to evacuate a population, they can just do it by edict.

No one is considering this edge case and how it should be handled at Uber. A company or community that has pride in what they offer would probably provide rides for free during such an anomaly. This is a drawback on the scalability of technology as we currently implement it.

Large CNC machines that are not exportable under ITAR use GPS and other sensors to detect movement.