Well. I guess this place is getting nuked.
Too bad. 
Now, I'm not one of the people who's been here since the beginning. And I'm not one of the regulars, posting every day. (This will only be post 27, in fact.)
I started coming here for the legacy NWN stuff, then came again after Inquisition came out--mainly due to its bugs. (Because the EA support site is beyond worthless.) But I kept coming, even as the game got patched up, for the other bits. Some was just "how do I find item X for side quest 47?" And then there were all the other crazy discussions. Some were just plain silly, some were serious discussion of lore. Sometimes, it got a bit heated (pro-mage v pro-templar, pro-elf v not, etc.) But even at it's worst, I never saw much of the "toxic" aspect you heard about. Sure, a few people got a bit heated, but there generally wasn't the same degree of deep nastiness as you can find elsewhere. (I'm sure there must have been a couple nasty posts here and there, but they were buried under all the good stuff, and the casual visitor (me) didn't notice them too much.)
So now, the forums are being shut down. And we're supposed to go to Facebook, Twitter, YouTube, or Instagram, or create our own communities on Reddit or Tumblr.
But the Facebook page mainly seems to be trying to sell me Mass Effect bikinis (or whatever piece of merch it is this week), which is not really what I'm looking for.
Twitter has that tiny character limit; what's the point? (It's good for links to things that are elsewhere, I guess.)
YouTube is good for videos, but not for discussion (and the video comments can get much more "toxic" than here). I'll watch your trailers there. But I would have been doing that anyway.
Instagram is photos, short videos. Not very interactive. Not much point.
Then there's Reddit and Tumblr. Reddit is hideous, and I find it hard to follow the threads; but at least it's a forum.
On Tumblr, it gets mixed in with everything else I follow. (Tumblr's sky-high dramallama quotient is another matter.)
None of these is a good replacement for this forum, especially not given how lore- and plot-heavy some of BW's games are. And none of these other places will build a community the same way as this place has.
And then there's the stated reason: it's hard for the devs to talk to us here, because they're off on those other sites.
But as a few dozen people have already mentioned, people talked to each other just fine, on these boards.
And frankly, I don't know how I'd talk to a dev on Facebook--ask questions about the next game in a comment when they post an ad for a licensed hoodie? I think not. Seems even harder on Twitter, YouTube, and Instagram. And don't get me started on "in-person" at events. The company is going to send devs to those events for promotion, not to get detailed feedback. (And I don't go to these events anyway, so there's that.)
And that gets to the fundamental issue. I don't think BW wants much feedback. Facebook, Twitter, YouTube, and Instagram are fine for promotion of the products (games, bikinis, whatever). But they can't match forums for getting feedback--especially not the kind of in-depth feedback some of the folks on this forum are capable of.
Right now, the devs (who allegedly don't come to the forums much) could come here and see what their most dedicated fans are talking about. They could see the latest discussions about elves, mages, quarians, whatever. They could see what people think makes sense in the lore, versus what doesn't. They could use the forums as a way to shore up weak spots in the lore, or get ideas for new directions to take things in. And frankly, they could enjoy the fact that they helped create a world that spawned such animated discussions.
And on a more nuts-and-bolts level, this is a direct way for BW to see what bugs are in its games. These games are huge, any more--a billion moving parts, it feels like. Nobody likes bugs, but they're a reality. There will be bugs. Will it really be more efficient to have people tweet them? Does BW want to have someone read ten thousand "There's this bug..." tweets when Andromeda launches? (I doubt EA tech support will improve much between now and then.)
And then there's the final bit: the suspicion that this is a preemptive move to shut the forums so they aren't an easy place to find criticism of BW's games.
I don't know if that's the case or not. It could just be a financial decision, after all. (Penny wise and pound foolish, imho, but whatever.) But they're not telling us it's a financial decision. They're telling us it's about devs communicating. The alternatives they list are inferior to the forums, for the most part. So if it's not really about finances, and the dev communication options are inferior, it makes me wonder if they just don't want to have criticism on their site.
Pity.