[allannienhuis]

Then what I'm carrying around is a bunch of codes in my head which is its own form of baggage, or I re-use the codes and that comes with the same risks as reusing passwords has. Using the phone for everything has risks too, but I think not much differently than a password manager does, and most phones I've used have a reasonable device recovery process (not that I've had to use them or have expertise in that area...).

Carrying a single thing (which has a bunch of other uses than just access control) doesn't feel like a burden to me.

That said, I don't disagree at all that the typical keypad for access control on everything pretty much sucks. My front door has like 4 buttons only and does the telephone keyboard thing of using the same button for multiple 'numbers' in your code. Time to jump on amazon to look for a decent front door lock that works with my phone :)