good question.Why this game is very popular?
At the beginning, it was a nice break from VNs, graphics were simple cartoons, etc. And it was nice for a year (frequent updates). I must admit that I myself supported (Patron) them for a year. But the more they received per month, the longer the updates took... Am I surprised: no, not at all. As if I was getting money for nothing (the amount of work involved is huge), I wouldn't be in a hurry either.
However I have the impression that they miscalculated and 1,5 year since the last update will finally end with the statement: it's impossible, we have to convert everything to a new engine... lost any hope