I think we should just take good care of the nsec and use tools like nsecbunker when possible to generate disposable little nsecs.

Nostr identity won't go away by simply having the nsec compromised. We literally know each other on a good level to know someone is pretending to be someone else. Not saying it won't create confusion to start with, but I don't see it as horrible as losing a wallet seed phrase or more.

Improving UX could prevent the majority of such accidents without having to implement a complex solution that most won't be able to use anyway. Unless they could of course.

nostr:note1qmuakk7f6zr3h8x0ng7ryc8rw2f2vjdr2ka74ayvh4lxr4hrk3jswxuqcp