I'm the OP, and I'm not referring to any specific wallets of any kinds. "I'm sure there is a world where the best way to store crypto is with a distributed ser

I'm the OP, and I'm not referring to any specific wallets of any kinds. "I'm sure there is a world where the best way to store crypto is with a distributed service, rather than a wallet." I think you've nailed it. The best place to manage your private key / seed phrase could be the blockchain itself, as it is decentralized, distributed and open.