I've never actually seen one that's booming with activity on a regular basis. I mean okay, Discourse lists some forums using it on its site, but activity wise, not a lot of them (outside arguably Stack Overflow and its spinoffs, which doesn't exactly use the main release version) are actually that popular with people online. Same goes with most other new or supposedly revolutionary forum scripts. They look nice, they might somewhat have an active official support forum, but practically speaking, the following facts are true: 1. Very few people/sites use them, so no one knows if they're going to 'save' forums. 2. Those that do generally don't see a significant benefit. At least, can you name any new sites springing up with these scripts that are getting thousands or millions of members in record time? I can't. Can you name any existing ones converting that are seeing a big increase in activity? I can't there either. So where's the proof any of this is catching on or is going to catch on? Where's that evidence that all these new and supposedly revolutionary forum scripts are actually going to 'revive' the forum market in some significant way? Cause I don't see it. And as a result, these new forum scripts and design ideas are looking about as convincing a 'revolution' as 3D glasses were.