[umvi]

The problem is physics. You have a bunch of people in fairly close geographic area transmitting to the same point in space on the same frequency band. One bad actor can interfere with everybody else's tx.

> What if people die because you cannot modify that code?

I think it's far better to trust unmodified safety critical code that's been tested than to trust Joe Blow's precariously modified braking code that allows his Honda Civic to drift around corners better.