This guy has never released anything with any sort of regular schedule. How people still pay him money for doing damn near nothing for so long is impressive. Especially for low-level SFM animations.
I didn't care for the characters or action variety in AI curious, but that was high quality and a fairly long movie.
For context, Purple Mass was announced 1.5 years ago and still seems like its in the early stages...so not great. Still WIPs are coming in with some consistency so its hard to reasonably cry foul.
If anything I question the hyper-niche nature of these long projects. I mean...AI Curious took years, and it was a pairing between a girl who stays fully dressed and a synthetic girl. Now we have Purple Mass...