Endings to a game typically take a lot longer than a normal update as they need to wrap things up, tie loose ends, etc. They can't just give us part of the ending or some endings (depending on the game). I've seen games require up to a year and a half to wrap up and receive that final update. That's why it's taking an unusual amount of time. Yes, this dev is slow and their work ethics could be better, but I have no reason to suspect or believe any of their games are abandoned.
This game has always been a side project, not a main focus... a means to prevent burnout. The dev posted here and in BM that when BM is completed, he/she will bring attention back to this game.
Also, I did post my predictions last year that we wouldn't see any update at all until early to mid 2025.