Im wondering just out of interest, I know a lot of people fly FSX ... why aren't there that many reports on OOMs...
There are in fact quite a number of disappointed campers. If you look around the forums; where in some cases views are extraordinarily high in comparison to the actual replies, though hard to accurately compute, it's still a very busy and anticipated subject.
Here is another thought:
FSX is now what ....7 yrs of age and prior to the time I made the jump (1 year to date) most aired on the forums that FSX was used for low and slow (VFR) while FS9 handled the heavies (IFR), (A practice that I believe it still prevalent today).
I think many people have come to terms with the FSX limitations and only a small few of us really enjoy all the bells and whistles of the platform, whilst others, possibly the majority, just embark upon the shear joy flying.
I can add to that in that with addons such as GEX and UTX and soon Orbx world most will be content with these packages and the advanced aircraft(s). As such, flying into the default scenery can be exhilarating especially when you can max the sliders.
Notwithstanding; in cases like mine, the work that these guys produce and others takes you to that edge of reality in that giving you the essence of immersion. I privilege that I very much appreciate from these folks and give them much acclaim for their talents and commitments