Here we go again. I saw this coming:
https://www.gearnews.com/mutable-instruments-no-new-modules-...
Yes, Gillet has a history announcing ceasing development and production. Just read 'Have we been here before?', and also the last comment.
I bet people already asked Gillet directly if B's announcement contributed. I don't know, a) i don't care about vendor / personality cults, and b) their forums are gone.
I know the designs are open source and produced elsewhere, but it's not unreasonable to wonder if Brains was what finally pushed her over the edge.