The redundant safety protocols they build into modern airliners is mind-blowing and, at the end of the day, a genuine comfort. Those engines are a technical marvel. I readily admit that, based on statistics alone, mine is a completely irrational fear. I know in my head that these redundant aviation safety systems exist...and yet, I still get tense enough on takeoffs and landings that I could rip the armrests out of the seats. I flew back and forth across the continent on a monthly basis, for work in my 20s and 30s...and if anything, I'm worse now than even back then.