If either of those accidentally triggered in the air would anything catostrophic happen? Auto breaks I guess have no effect in the air as they break the wheels? Thrust reverse unlock sounds like it allows thrust reversers but the pilot would still have to manually activate them?

Someone else was talking about a WoW (weight on wheels) sensor that locks the landing gear down with no manual override but again doesn't sound like a catastrophic thing to accidentally trigger in air (indeed this particular aircraft had a landing gear that was stuck so a faulty WoW sensor wouldn't have made the problem worse).

This particular mode switch thing sounds like it does something to the flight control that immediately causes catastrophe if turns out you're still in the air.

There have been problems with thrust reversers deploying in flight, I do not recall the details of why.