My friend's team lost a week over a missing paper trail.

Wait, you don't back yours up?

My A&P instructor called that the "no surprises" rule for a reason.

Digital manuals can't smell like coffee spills and jet fuel.

Honestly, the battery issue gets me. Like @stone.thomas said about placement, but even a good spot fails when the cheap wireless sensor battery gets low. It doesn't just die, it sends weird signals that trip the alarm. So you're changing batteries constantly instead of just having reliable wires.