Modern hardware wallets already implement hierarchical determinism, and have for a few years. Extending that further to do private keys per site wouldn't work o

Modern hardware wallets already implement hierarchical determinism, and have for a few years. Extending that further to do private keys per site wouldn't work on most chains I know due to chain state... Details in BIP-32 [0] and BIP-44 [1]. [0] - https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki https://github.com/bitcoin/bips/blob/master/bip-0032.mediawi... [1] - https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki https://github.com/bitcoin/bips/blob/master/bip-0044.mediawi...