>This really isn't a the good example of pro-safety critical design you think it is, cars have exactly the same "back doors" as this airbag vest at the engineer

>This really isn't a the good example of pro-safety critical design you think it is, cars have exactly the same "back doors" as this airbag vest at the engineering / electronic control level. You're going to have to back that up to convince me of that, because as I said, AFAIK that's the not the case (not that I know much on car safety mechanisms -- but I've yet to hear/see anything suggesting to the contrary beyond this statement). >It's not fair to frame it as an anti-failsafe, when it was designed to prevent shutting down after the ride starts. You know what; that did the trick. I'm convinced. You're right, if they designed it as purely a boot-up flag (it turns on, or it turns off, but it's designed to be 100% up unconditionally once on) then it doesn't conflict with anything I've said. There's no additional risk being introduced that I can imagine from this setup -- beyond that inherit to the problem. I still find the framing pretty dumb -- they should have just called it a rental -- but otherwise I'm fully convinced this is a non-issue.