Not quite, there was another developer that quietly made a lot of work in the time he was around, after Grimm just vanished shortly after those posts, and basically left the entire thing in an usable state for later. Unfortunately he left after a series of personal tragedies that rendered him unable to function for a while.

That guy never gets any credit which is rather sad. I really don't know how he still has a will to live after all that has happened to him.