Shamir is one of the suggested ways to restore crypto in case of death with more decentralized trust. You select 20 friends and give them each one of the keys, then at your funeral 10 or more of them come together to unlock your wallet and execute your will. But it has a big problem: rot.
It needs to be accompanied by a system that ensures everything is still in tact. The system would ping every key holder every X months and have them prove they are still in possession of their key. If a problem arises the wallet owner is alerted to deal with it. Otherwise she gets an all clear report.
The annoying thing tho is now there is a centralized 3rd-party database of all your key holders. Part of the security is nobody knowing who's in on it. Imagine a wallet with $100M. That database starts becoming valuable. So the service would have to be zero-knowledge or hosted, but now you're hosting stuff, and not just any stuff, the most valuable stuff, requiring top security.