Ondsel's goal was to make money by selling cloud services for CAD users. They were probably bound to fail in that endeavor-- and they did. Still, it was worth a shot. But their biggest contribution to FreeCAD was being the adult in the room and getting all the different groups to agree on how to move forward to solve the biggest problem, the TNP issue that FreeCAD had from the start and couldn't be arsed to fix. Ondsel's lasting contribution is the Assembly workbench that is now be the default Assembly workbench for FreeCAD. And it's a lot better than the other 3 hacked solutions.

realthunder was involved in folding his TPN solution into this 1.0 release. Though my understanding is that it's different than his implementation. He is now back to his fork and is supposedly cleaning up his code to work better with the mainline branch of FreeCAD to make his code easier to insert.

Personally, I would move to either the stable 1.0 release now or, I you are crazy like me, the 1.1 weekly releases-- brought to you on github every Tuesday and Saturday for your alpha enjoyment of the bleeding edge.