How does bip39 work https://www.anobii.com/en/01000289012ff9b293/profile/activity Although it works by using BIP32 strategy it is possible to even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There exists BIP44 Edition which some wallet use for that technology of seeds. How much stability does a passphrase insert? A BIP39 https://bookmarkinglife.com/story5816919/bip39-alternative-new-step-by-step-map-for-bip39-standard-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw