You really don't appreciate how bad Nostr is for DM's until you do this:
Paste someone you find interesting's pubkey into any client and open Messages. You will see who is sliding into their DMs, when and how often they chat, who sends the most messages, how far apart, etc.
And nobody knows you looked. This is death to many relationships and vital business intelligence. Just scrolling this thread, I can tell you who is working with whom and who is hitting on whom behind the scenes.