I think Facebook, Twitter, Instagram, and similar, have totally replaced forums for many people, although forums do still seem to be popular for specific interests. Basically, all the people who were on forums more for the social side rather than the debate, have left, and not come back. I haven't logged into Facebook for years. To my mind it's an abomination, and I won't return without major reforms. And I resent that so many organisations ditched their conventional web presence, and now only exist on Facebook.
I still have a minor crush, but I haven't seen her for a long time.