We don't have just text here. And even if - one day on Twitter generates far more than 500 Million tweets. Let's say they were only 140 chars (which they aren't any more for many users), that's 560 bytes - that would be 260 GB *per day*. I doubt there is even a single Nostr relay that could handle a week of data, let alone a month.

Well, we do just have text, but that other stuff still needs hosting so i get your point. Two remarks: 1: there is no need for everything to be on a single relay. Sure there will be some bigger ones but the whole point of Nostr is that all this stuff is scattered, whilst users just being able to get the stuff they want from where it resides. I guess you have misconceptions on what the relay model behind Nostr actually is, not really your fault because its not clear to many, not even many devs, atleast not at the start. 2: relays are just webservers. The fact twitter can do it, is proof its technically possible to do. (I get it costs a lot of money etc.etc. but for that i refer back to point 1, my point here is that there is nothing special about relays)