You're right. Nothing. Last I checked, catalog items, places, megagame, more than 20 players. Nah, nothing is restricted to BC. And the graphic settings aren't the problem. The problem is how much bandwidth it consumes and the community isn't like it was in 2006.
Catalog items:
Yeah, there are some, but they're not very good items anyways.
Places:
Yeah, that's bullstuff. But if you mean Builders Club servers, you're not missing many "Obby for 100 tix"
Megagame, more than 20 players:
Games (like Survive the Disaster) have 15 players per server There are sometimes 15 pages of the same server being played by 20 people. As a Mega server, they have more than 20 per server. Why do you even need that much? :/