I think forums have gone or are going the way of the little magazine of the 60s and 70s (and 80s). Dying, slowly but surely.
You can create the most bodacious forum software out there, but the "users" that remain--far and few between--won't give a rat's ass. Forums are dead. Nobody cares.
The NSA stuff hasn't helped any of this. Even before Mr. Snowden, though, forums were on their way out. Somebody show me a new forum that has its wings, and I'll eat my words.
Go ahead. Make my day.