Bip39 release date https://www.anobii.com/en/01000289012ff9b293/profile/activity Regardless that it works by using BIP32 process it is possible to even now import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Model which some wallet use to the technology of seeds. BIP39 simplifies key management by changing extended cryptographic information with uncomplicated-to-use https://hubwebsites.com/story21564569/bip39-trezor-bip39-ian-coleman-for-dummies-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw