>>40111>>40117I may have an idea. It's likely they are kinda abandoning their fetish. I think they tried to walk away after the whole Galactic Expand gig didn't work out, and possibly tried to improve on their style. There is this FA here
https://www.furaffinity.net/user/puffpuffbloat/ and their style seemed pretty familiar so I'd assume it might have been them attempting to comeback with improvements to their artwork but stopped in terms of doing art. It is still active based on those faves though.
Even if it doesn't happen to be them, I can confirm they've went on to be an active Sonic/Mobian Vtuber with a streaming career.
As far as I can tell, they might have moved on to focus on their career of being a Sonic/Mobian vtuber.