Nostr Address:

- It looks like an email, but isn't

- It is permissioned

- It ties your Profile, that you use for infinite use cases, to the domain of one such use case.

- You have to get it 👉 most often at a price

- You will likely change it or lose access to it, so it cannot be used as a permanent pointer

Npubs are great and can be enough.

Also, it's not even an address.