In 32 years of Flight Simulator / Prepar3D I've never seen a new simulator version that runs smoothly on the PC most people have. It has always been "New Sim, new PC".
I never really understood in which computers they develop the software because I had cases in which, even with the best PC I could buy in the market, the thing looks bumpy (low FPS).
These days I'm a bit sick and tired of these cycles that make us expend several thousands Euros (hardware and software) and many hours of installations/twicking just to keep up. I like to fly, you know, not playing software engineer (which I already do in real life) as a hobby.
Oh how I miss the days when you install the Sim and 10 mins later you up there flying and fighting! Now it's like: Sim ,then FSUIPC, then weather, then textures, then shades, then aircrafts then scenery then navdata then ... you got the point.
I guess I'll keep my stable and featured P3DV4.5 for a long time ... and keep hoping that FSLabs won't pull the carpet on this version somewhere soon.