Very thoughtful and informed reply. Thank you for sharing your knowledge!

These conservative warnings exist for a reason, though. That being hundreds of lives at stake. What I think would be more interesting is to hear how often these types of events occurred before and after the layoffs at the FAA

While this is good advice, best practice is to always get your yubikey in pairs and keep them synchronized. One should remain in your home, in a safe place (as you described) while the other should remain on your person or outside the home (e.g. in a safe deposit box)

It’s more of a pain in the ass for sure, but handles the theft scenario more effectively