Good move in my opinion.

The code in FSX is stuck in virtual perpetuity. This will only limit what developers can do substantially and leave them to still hack around issues which consumes much time and resources.
Indeed moving on to P3D v4 when it was released meant saying goodbye to some aircraft, I can say I get more enjoyment out of the new ones being made taking full advantages of the new SDK capabilities. I rarely have any issues and crashes have been a thing of the past for the last year, a positive change that I certainly don't miss. I now spend most of my time enjoying my simulator and its content rather than tweaking and fixing it; a situation that was all but impossible and never ending for me with FSX.

You will have 100% of my future support C.S..

Cheers