I hope we'll eventually be able to use some of the key storage/backup solutions being developed mostly in the cryptocurrency sphere. Like, multiparty computation (MPC) is agnostic to the type of key being created, and some of the social recovery methods being tested could be applied to parts of the key. Being able to protect your key from loss but also from theft is a hard problem they're highly incentivized to solve (and other people are highly incentivized to test/break).
