Page 1 says the release date for v 9.6 here was 8 May last year, and it appears that he has been collecting patreon payments for a good while longer. A few dev's have been able to make their game a full time job, but for most it is a hobby. No, I think, if he has been neglecting this game for 9 months, we should call it that. If the dev were cultivating his player base, he could certainly make this his full time job, like dpc with bad.
What I see is that he put together just about the best game on f95 for season 1, ended it with a drop dead cliff hanger, and then took a nap. I am not convinced there will be a season 2 at this point. It is true he put up his Steam page 27 Feb this year. But f95 says the game is a lot older than that.
The origin date for this thread is July 2018, so that tells us how long he has actually been working on this. 9 versions in 5 years (up to last May). That is almost 2 versions a year. If you include the .6 with the 9, it is almost certainly 2 a year. Yeah, I'm feeling a little disturbed. And if I had been paying him patreon for all that time, I would probably be stomping around the room. But, yeh, I do understand that game development does take a lot of time. And the dev actually owes me nothing at all. So at six months, I will still be defending a dev. At a year, I am feeling stressed.