I just happen to catch a couple of comments over on a Gearslutz thread. This was off the topic of the thread, but the guy from Bricasti had actually gotten the M7 Reverb to work using 9 of the chips on an HDX card (which is half of them). Sounds like Avid wasn't interested in a plugin that used so many chips at once.
But wouldn't that have been nice!
It's the last few posts on this thread:
https://www.gearslutz.com/board/pro-...t=bricasti+dsp