My phone NEVER leaves my side, that’s not a big issue. And thankfully my wallet is 99% obsolete, as most of the cards are already in my phone, and the few that aren’t fit in my flip case. Keys are another story, fuck keys! Bulky loud ass bullshit! I’d love a keychain that could live in my phone or have the format of a card.
My Renault car has a pretty neat card that auto locks and unlocks the car. I just keep it in my breast pocket (or backpack in the summer) and forget about it.
I occasionally do the same with an album I know takes almost exactly 1 hour to play. Have it in the background and roughly know what time it is.