People on KS have apparently been asking for an update for a while now, but nothing. Saw a person wondering if this was all a scam. This is what I meant when I said that the author is destroying themselves like this.
Well, that's what you get when you drop off the face of earth: people start making assumptions.
My personal best guess, based on the last updates, is just a good old burnout, likely a mixture of perfectionism and the general amount of work. I'm like 99% sure it'll get finished someday anyway.