Guys, why are you worrying? It hasn't even been a full year yet. After a year between updates has passed he'll come back with a status update with empty promises of the update being "almost finished and will be out soon™." That "life got in the way," that he's sorry but he's making some form of change to make sure the next updates come out quicker. Then another half year will go by and the update may or may not be released then after second round of months of radio silence. It will probably be a full two years between updates this time too cause he doesn't have the same monetary incentive since Patreon booted him. (Of course one would think that it would be wiser to double down on communication to rebuild his supporter base, but we all know he's not gonna do that. Lol. He'd have to post once every few months to the people who pay out of pocket to support him... *gasp* What an unthinkable amount of commitment!)
I'd say if you don't hear anything by Christmas start to get worried then. The abandoned tag will stay throughout most of this update.
Oh, and though I've said all of that let me preface it with this. Don't get your hopes up. Xenorav is a flake. He's a talented flake and this VN loss would be missed, but place no hope in that man getting his shit together. This VN could've been great and made him a shit ton of money after he got lucky enough to gain early support. But it was squandered by his lack of transparency... And then Patreon blew out all of the passive supporters who forgot to check their monthly subscriptions... More people who might've transferred to subscribestar if they really believed in him. Anyway, if it fails he has no to blame but himself. It sucks, but there are other VNs.