Well, it had to happen at some point. T4Fx 45 will be the final version to have source parity. After that we are simply doing features and updates. But there are several things that are going to kill source parity and Kaiser has gone pretty much as far as he can go. http://tenfourfox.blogspot.com/2015/12/3850-available-and-maybe-45-as-swan.html Once this is out, it's just a matter of time before there are no more fixes to what's broken on the net. That'll be a while yet, but the handwriting is now on the wall.