From his Q&A post on Patreon. Just this little sentence: I must have rewrote this story 10x to make it 'perfect', I kept redesigning characters to make them 'perfect', and kept redoing renders to make them 'perfect'.
If this keeps up you might as well mark this abandoned right now to save time from marking it later. Seriously, there is no perfect. It won't ever be perfect. It will only be the best it possibly can be. If the developer is trying to make it perfect and constantly reworking to make it perfect then it will never be finished. How good it is is in the eyes of the developer but if he never says its good enough then it never will be done.
Another line I thought I was funny:
--- What exactly are your future plans for the game?
Again, it isn't really a satisfying answer, but I plan to update it on a fairly regular schedule once this rework is done, and finish the story.
What is this now? The 3rd rework? 4th? Its been a year since the last update. Its been years since the story actually moved forward. With the mindset I just pointed out above this then this will never have regular updates or ever be finished because the developer will always find something wrong and rework it.