This is a picture from FS 1.0 (First FSX version)(credits to Wikipedia)
And this is a picture from Infinite Flight 1.0 (First Infinite Flight edition)(Credits to the Get My Android website)
As you see, IF definitely gets the point! In FS 1.0, users couldn’t even see the exterior of the plane and the graphics where very bad.
This is a picture of FS2004/FSX 10.0 (Latest FSX version) (Credits to Wikipedia)
And this is a picture of Infinite Flight 16.12.0 (Latest Infinite Flight Edition) (Credits to me)
As you see, Infinite Flight isn’t so far from FSX. FSX has a bit better textures and 3D buildings. And a few smaller details. And FSX has been developed through many many years. But IF has been developed for only around 2-3 years and is a Mobile simulator. I’m sure if it gets developed a few more years, it’ll be way better than FSX. So don’t complain and wait a few years.