I know what you mean, but as I said, how my friends feel is a big part of me. I think of anyone, and I do mean anyone, I count as a friend far more important than me. I'd burn in hell, or drift off into oblivion, perfectly content, as long as I know they are happy themselves. But when I find somewhere that causes great unhappiness of friends, why would I stay?
As for who left, they may not have told anyone yet, or made a goodbye thread, but they left. Who some of them are, I cannot tell you, for I made a promise to a friend.