Bip39 derivation https://files.fm/u/2eemhhak2q#design Even though it employs BIP32 process you'll be able to continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 You can find BIP44 Model which some wallet use for the generation of seeds. BitBox02 - A successor for the BitBox sequence, this components wallet https://socialeweb.com/story5281665/bip39-nedir-bip39-compatible-wallet-options-https-dzen-ru-bip39-phrase-com