FB groups are killing forums. Sad, really, all FB groups have a life cycle.
FB group started
FB group active with real content and knowledge
FB group grows in popularity
FB group becomes dominated with sarcastic remarks mixed with good comments.
FB group becomes more memes and sarcastic comments
FB group essentially has no good content and anyone offering good advice has left
FB group is now nothing more than an entertainment group around the hobby it was started under
FB group is now totally useless and several hobby specific forums are dead.