But your feed would be improved 200% 🥳

Not but seriously. I think yes you're right. The feed would be slower, almost a crawl lol. HOWEVER the problem people have isn't the quantity of posts lol.

People can imagine the technical side of Nostr improving. Let's say a client that's a bit janky. That is very easy to imagine an improvement. It's far harder to imagine a whole cultural shift, like a more varied group of subcultures joining. And a feed full of bitcoin actually does give that impression. 'This place is for bitcoin chat.'