Zachtronics wrapped up because they all got a bit burned out by the yearly release pace, and Zach tried to become a teacher. He didn’t like it, and when the rest of the team continued making games, he joined up with them and thus Coincidence. Further down the discussion I shared a podcast where he tells the story.

I understand why he might not want to and hope I would have the character to do similarly in his place, but they should really lead with "by Zach Barth" rather than "from the original Zachtronics team", which still sounds great, but tbh at least for me bumped it from "buy and play immediately" to "wishlist".

From other comments in this thread, it seems I am not the only one who misinterpreted that as not including Zach himself