I've been wondering the same thing. My PC is mostly up to spec with the exception being the GPU. I have the following setup:
ASUS ROG GL752
i7-6700HQ
24GB RAM
But here's the problem
Nvidia GTX965M
Doing some homework and despite being a few generations newer than the 7 series Geforce it's a good 30-40% slower than the minimum 770 they state in the specs.
I run most xbox games fine on this machine and have played forza 6, 7 and horizon 3 and 4 on here without issue.
X-Plane 11 runs pretty well on this setup and I also play FSX from time to time with decent results.
I have GamePass so i'm giving it a shot and hoping for the best before I pull the trigger. There are no upgrades or new PC's in my near to medium term future.