I know of no wargame that offers any sort of real 3D rules, the most you get is basic elevation.The most commonly accepted definition of Wargame that I know of, would very much include X-Wing in it.- The lack of 3D kills x wing.as a wargame. It is a good game, but not a wargame.
This is truly 3D: https://boardgamegeek.com/boardgame/21706/clouds-glory
Those 4 foot long sharpened sticks look like a nightmare to play around and store. And why do so many 20th century dogfighting games focus on WWI?? WWII dogfights were so much more exciting.
I can't answer for 100% certain, but part of it is a matter of scale. Aircraft of WWI were much more similar in terms of size, speed, and capability then the aircraft of WWII. Some WWI aircraft had higher operational ceilings, but not by a great deal — not like those in WWII.
By the time of WWII, aircraft had become extremely specialized (for the era) and developed much great capabilities. If you want to play a good age of WWII aircraft, you need to take into account some aircraft were extremely fast, others not at all, some could climb and turn like their life depended on it, and others could be said to "wallow" more than turn. All that makes for a difficult experience to simulate, or even make a fun game around.
WWII Wings of Glory is a fun game that I like a lot, but it struggles a bit to integrate all the different types of aircraft. Bombers barely manage to move across the field, and the card– based movement system doesn't really give you the impression of speed that I would like.
A lot of these problems are "solved" in WWI. All the aircraft are close to each other in speed and maneuverability characteristics (much closer to each other than WII aircraft are), and that makes it a lot easier to build around.
That is my impression, anyway.