Well, I'm going to sound like an old guy .. partly because I am one. But I've also been on Prime virtually every day for the past 15 years. Not a fan of Facebook .. but I embraced it as part of a recent group buy (that was the good part) and I've been inundated with a mostly useless flow of chatter than wastes my time.. and I'm about to shut it off. (I'm putting my flame suit on now). I would characterize most of it as chatter about meet-ups which most of us who don't live in SoCal don't have any interest in because (a) we don't live in SoCal, and (b) it wouldn't work where we live because there's not enough of us ... plus a whole bunch of "look at me and what I've done" types who seem to be looking for some kind of validation that their latest purchase was a good one ... or ones who seem to incapable of setting their own style and want people to flood them with pictures of whatever wheel or wing or seat that they might be thinking about ... or treat their FB friends as some kind of personal Siri service to give instant answers because they don't have time to do it themselves. I've gotten only one nugget of information in about a month and that was someone posting their maintenance experience that Honda was no longer stocking a particular part ... good luck ever trying to find that when you need it. Virtually everything else was throw away content.
Now Prime's value (at least to me) on the other hand is that it's a resource hub .. where you can usually find stuff when you need it .. and as RYU said, you can have a 'stimulating' discussion about a technical topic because the people on here selflessly share what they've learned and what their opinion is (if asked) and they do their research before asking questions ... they're 'givers' not 'takers' like a lot of the FB crowd. Most Primers likely won't get together at local meets .. but you'll find them and get to know them at NSXPO meets. Let the A.D.D. types migrate to FB where they can feed their need to be constantly stimulated .. the real value is here on Prime.
Just my $0.02 worth. I might be a Luddite ... but I have put in 40+ years of corporate I/T and have seen the rise of social media and its characteristics .. and I'm not liking most of it. I believe that Lud has tried to evolve Prime to appeal to those who need a social fix but I'm suggesting that it's two different crowds .. with different needs and expectations. As some have suggested here, FB's strength is lightweight immediacy not sustained value and permanence that Prime's strength is. Unlikely you'll find one tool that does both.
.rant off