S!
If I got it right, SoW will have DirectX 9 mode as well and it should pose no overwhelming obstacle to anyone. DirectX 11 is the mode for all the bells and whistles aka eye candy. This is why I referred that SoW will make even a high end machine to sputter a bit if EVERYTHING is cranked up
More graphics and fidelity in all areas of the game = more horsepower you need to run it
But as seen before I am sure SoW will be very scalable for many computers without suffering from looks that much. And I am sure the program can use more memory than IL-2 can