Earlier quoted context omitted.
UX with hardware wallets (which you can get for like $60) is pretty decent these days and it eliminates a lot of stress in the workflows you typically use. There's still a huge room for improvement with seedphrase backup and "social recovery", but it's easier now than it's been in the past.
How does the average person back these up in a secure, yet durable way that lasts decades and can easily be discovered by (and only by) their ultimate heirs?
There is shamir secret splitting, multisig, MPC, secure enclaves with biometerics, etc...
There will be apps like Fuse wallet: https://www.fusewallet.com/
There will be phones like Saga: https://solanamobile.com/hardware
I think how one handles their wallets will be much like how people make their espressos. Some will just stick k-cup in a machine and hit a button, others will become full-blown coffee enthusiasts that carefully measure their beans, de-static their grinds, and extract for the exact right amount of time.