I'm from a team who is managing a SMF Forum since the date they launched the platform. Today we are a Car Club Community, one of the biggest in Portugal and we are thinking to move on to something better and Flarum fit's what we need.
We are seeing most of the foruns going down because social networks and his good usability and the easy way to communicate. I think Flarum can get some of the foruns up again like ours.
SMF like someone said in this topic is old and some of our users don't use it because it's hard to use it. (Bad UX).
We have spent some money in the latest years upgrading the usability, features and so on... But we are seeing the numbers.. The users don't use it or use it but with difficult.
So in the last months we have been studying how Flarum can help us, if Flarum is a good start point for a new Club Generation and if in the future we can integrate this with our Portal (WordPress). We think this is our new home 🙂