Not sure what you mean.....a passphrase is not device specific and is not part of the seed but added to the seed. Any passphrase added to the seed makes a new wallet.
Discussion
Re-read the original post - the Bitcoin mantra is that you only need your 12/24 words
The OP was about the pitfalls with added complexity in a setup, passphrases specifically.
I am saying it is maybe more correct to educate people on the importance of testing/proving recovery and good backup practices, and to not blame lost funds on something other than common user sloppiness.
I didn't get that from your replies, but you're right everyone should test restoration