Bip39 12 vs 24 https://www.empowher.com/user/4550298 Though it takes advantage of BIP32 strategy you are able to continue to import BIP39 seeds into Electrum wallet. Also besides BIp32 There exists BIP44 Variation which some wallet use for that generation of seeds. BIP39 solves this by making use of human-readable seed phrases https://opensocialfactory.com/story23807812/bip39-algorithm-not-known-details-about-bip39-word-list-txt-https-linktr-ee-bip39