Hello fellow Flight Sim Users.
PC performance is always going to be difficult to judge.
I've always advocated a 'horses for courses' approach, or is that 'planes for airports'.
Using the excellent 'Scenery Config Editor' has been they key to my near zero 'OOM' exceptions.
And a powerful PC in terms of 4.5 Ghz, 1080p, GTX 1070, SSD solely for FSX use and some of minor tweaks of the fsx config file and NVIDIA inspector.
And then another PC to offload Weather, Comms, and everything else onto..
In fact, I've spent a fortune on Flight Simming over the years, but it all works.
As for P3D 64 bit. I'm sure it's coming but, if we jump to XP11, now it's out of Beta. They've corrected a lot of things from XP11 including the flight model, and now the third party developers have to update their planes to get the best out of XP11.
To see a plane maker making planes for FSX, FSX:SE, P3D:2.5(32bits),2.6(32bits),3.0(32bits) and then (I'm guessing) V4.0(64bits) for approximately £30 or so, I'm sure they're likely to give up and do something less stressful.