To be honest, part of me hopes that Stoper's latest development blog is just a different approach to come up with an excuse for the delay of this update. Like
Bolero said, there's always something that leads to a delay on his releases, which I usually call poor project management considering Stoper's plans and the statements he's making.
I know that does sound kind of stupid, but I'd prefer another excuse over a possible abandonment of this project any day of the week as it's still one of my favourite VN's out there. And seeing all the development blogs, I find this statement kind of conflicting with the previous ones as there has not been a single word about burnout or the lack of motivation etc. I remember him talking about the possibility of a delayed release due to him adding even more content at the end of the already planned out events, if he feels like it, which to me really doesn't sound like someone who's lacking creativity or the motivation/passion to create and deliver new content.
Two updates per year wouldn't be surprising either, as that's basically what we're already getting from JOHN anyway, and it would only fall in line with other projects out there which will most likely never see the finish line.
Anyway, that's just me speculating (or hoping), but only time will tell.