Oh, don't get me wrong. I absolutely do see the use case for "more than a couple BGS running", I just hadn't yet set up the plugin for it (still haven't written one that's gone public - I need to work out a way to STOP a BGS from running, since the built-in RPG Maker controls don't expect more than one at a time. Might use an "alias for each one" solution like the Soundtrack plugins use.)
But 16 is overkill, to say nothing of 200. Performance-wise, it worked when I tested it, but... don't.