hey OP -

for some, it's unnerving to have a seed phrase that can be discovered or forcibly taken. and splitting it also introduces issues. MPC with keyparts isn't quite ready for retail (like zengo), but a dual factor seed phrase is intriguing...

if you write about the passphrase - a word that works in tandem with your seed phrase - this "seed phrase password" (part of BIP 39) would fit quite well within the context of presenting steps to secure a seed phrase