My opinion is that you should remove NIP-104, whatever that is, and keep only NIP-17.
Discussion
NIP-104 is MLS (a newish messaging protocol) over Nostr. nostr:npub1zuuajd7u3sx8xu92yav9jwxpr839cs0kc3q6t56vd5u9q033xmhsk6c2uc speaks about it here: https://youtu.be/PWKd9aoZ-Cg
Looks very promising, but not ready to be implemented into clients yet.
Yo! 😜
Oh, it's that thing? Sorry, I thought it was the proprietary "private chats" thing 0xchat has currently.
We need a new number with only two characters for the MLS NIP, please, it's very important.
Hex is accepted now, by the way.
Hex NIP numbers? Ooh, I like that. I'll think of something. 🙃