Glad to hear it, if you have any suggestions please let me know.

Yea I have, and that's exactly why I created this. Finding them without this tool would have been really annoying. Here's a screenshot of the top 12h rooms:

Right now they are pretty diverse. The two most active I recommend starting off in if you're English speaking are #envs_lounge:matrix.org and #anime:matrix.org

This is the one I made https://matrix.to/#/#all-topics:matrix.org before I created the activity tracker and realized there were several others.

The biggest problem I've noticed is that the amount of "Members" is displayed in clients, but so many rooms have a lot of "Members" but no real activity. Which is what this tracker attempts to solve by looking at actual chat messages and timestamps.

Considering Matrix age, and precedents, my bets/hopes are for a new protocol to emerge as a "modern Matrix" (just like Matrix was marketing itself as "modern XMPP").

Matrix just doesn't have a great and smooth UX right now to compete with the main actors, the heavy protocol is to blame so that's not something we can hope to see sorted out quickly/on time.

I think it will, another reason I built this, because new people coming to matrix will need a way to browse rooms more easily.

In hindsight the accounts counter was incorrect it was adding up all the accounts from every room without considering that many of the same accounts come from different rooms. I'll have to add a deeper tracker which I don't think is necessary to track individual accounts, outside of the scope of the activity tracker.