Bip39 history https://telegra.ph/Producing-Custom-Bitcoin-Addresses-A-Take-A-Look-At-BIP39-Strategies-06-28 Although it uses BIP32 method you are able to continue to import BIP39 seeds into Electrum wallet. Also besides BIp32 there is BIP44 Model which some wallet use for that generation of seeds. bip39-phrase.com is definitely an informational weblog committed to technologies and too... https://thefairlist.com/story10273168/bip39-mnemonic-bip39-compatible-wallet-options-https-x-com-tundra838554