Hi, Richard, and a warm welcome to the forum!
Wow, I suspect you're going to get a lot of different opinions on this question!
Anyway, FWIW here's my 2ȼ, but bear in mind that I moved straight to FSX (from FS9) as soon as it was released, hence have been using it for getting on for ten years now....
I have admired P3D from afar, but TBH the only significant change that I notice onscreen is the presence of cloud shadows (and from 40,000 ft they are not too important to me, although if you mostly vly low 'n slow I can well imagine that they could be a factor). Much is mad