I don't think we'll ever see him release anything. After 3 years of milking without any update, releasing anything short of a completed game with triple the content would shatter the delusions of his patrons and cost him a lot of support.
You're right that he received way too much money for his work and that he's one of the people who soured patronage as a method of financing games, and I'm certainly not going to defend him, but I don't think you're entirely correct.
I mean, he doesn't need to release a completed game with triple the content. Gumdrop already announced that the game is going to be split into three acts and only the third one will have actual sexual content. Assuming he keeps the ten-part-per-act format, this means another 21 releases before the game is actually completed.
Will he release anything this year? If he doesn't, he'll lose all his patrons in a few months. If he releases anything, he'll keep patrons and start regaining them. If he likes the money stream, he has to release something.
In fact, not only do I think that he'll release part 10 of act 1 this year, I think that he'll start working on act 2 and release at least one part of it, maybe more.
The guy may be an greedy lazy asshole, but don't forget that he did release nine parts of Dual Family, so he knows how to code using RenPy, how to write a story and how to render graphics. He's not incompetent, he's lazy.
On the other hand, you could be right because between August 2018 and April 2019, he went from 1039 patrons to 674 (on the first, then stayed at or below 704 patrons all of April), then dipped to 637 on the 1st of May, but rebounded to 958 patrons in September 2019 without releasing literally anything. It's April 2020, and he only dropped to 688 on the first and has 709 patrons at the moment.
So without doing anything, he kept the same revenue for a year. So sure, it might happen again this year. But it would depend on his patrons being idiots or Patreon didn't change the way they process membership/patronage statistics for over three years and still show non-paying patrons as active (doubtful, since there would be no dips on the first of every month).