Actually, yeah, you can totally compare it to everything else, it literally does not matter about what the flight dynamics are doing because that is nothing, it should not take any performance away at all.
What's sad is that people think this is normal and that X Plane is good because they get horrible performance.
In P3D which can definitely be compared to X Plane because it is a flight simulator, you can fly an A2A Piper Cherokee, Comanche, or Cessna 182 and 172 and they enter the data exactly as it is in real life, yes, if you fly a Carenado plane you will fly a brick, because they don't enter any flight dynamics data because they're lazy, you can feel the difference especially if you have flown the real planes.
I can tell when there is something wrong or Probably bad code when I am playing at max Settings in XP11, then I do what you say and lower the settings from 4k resolution and max settings to 1080p and medium settings and can't make any detail out at all and get THE SAME FPS, that sir is pathetic.
When in their Competitors Simulator I can play with the same settings and actually higher settings and get 50-60 fps at 4k vs X Planes 20-30.
You can always find something to compare something else to, do we not compare aircraft in real life? Does Boeing and Airbus not compare and compete with planes like the 787 and A350? Or Cessna vs Piper? Cessna Citation vs Embraer? Xbox Vs PlayStation? Apple vs Samsung?
Oh, but "it's advanced"....exactly as I said, people think bad performance males it good...
Your excuse to all of these people getting horrible FPS in something that they should get a locked 50-60 fps at Max Settings and 4k because we have the PCs to do it, is that it's advanced. When I can do the same thing in their Competitors sim and get better fps and it looks better because of add ons, and flys just as realistically depending on what you fly and who made it.
Sorry to sound rude, but like I said this kind of performance is totally unacceptable and should be fixed, this is 2017 nearly, in 5 years when XP11 is 11.8 or something and people are using maybe Laser SSDs and 64gb of VRAM and 6+ghz CPUs I don't want to get the same performance in XP11 that I did 5 years ago, you know something is wrong with someone with a Nvidia 1080 and Better CPU by a good margin, at least 10% is getting the same FPS as you.