It's now been exactly 1 year since dev said the new version of the demo would be coming "soon" and there hasn't been any announcements outside of patron-only updates since. From what I read in the comments of the last public patreon update he's still working on it but we'll see how long it takes until it's actually out.
Update: it seems there is now a patron-only link for the prologue on the patreon site, meaning it'll likely be out for the public sometime soon.
Shame about the lack of communication with the outside world, really.
Agreed. I find it kinda count-intuitive that the only way to learn the progress of a game through a paid subscription. Don't get me wrong I supported him and his talent once before but it would be nice to know some sort of progress outside of Patreon.