I'm sorry, I don't quite understand the question, or if there is one. You want 2000 different channels or topics? That's totally fine. Muut supports unlimited channels, topics, posts, users, bandwidth, etc.
I think maybe the question might be is there a way to nest channels inside other channels so there could be groupings and drilling down - so that there's not a flat view of 2000 topics in a channel
Oh, I've just discovered sub-channels!