Now you have the possibility to split your nsec using a technique called FROST and distribute each shard to an independent trusted remote signer.
This will give you a bunker code that you can use to login in many web, mobile and desktop apps without exposing your nsec.
If you ever lose your bunker code, if the signers vanish from Earth and it stops working or if it gets stolen by a malware virus you can use your nsec to create a new and invalidate the old one.