[mxschumacher]

The requirement I've set for myself is that I should not lose access to my accounts of data if I lose some or all of my hardware, be it to mechanical failure, theft or me losing my phone somewhere.

I don't think there's any way around having a safe physical location to store backup codes / secrets on paper.

[dragonwriter]

Codes on paper are still bits of hardware that can be lost, stolen, or destroyed.

[mxschumacher]

I'm less likely to lose a piece of paper in a safe than I am to lose the phone in my pocket