I've been doing the training missions for the F18 actually and downloaded the flight manual for her.
I've noticed. I was working on the A10 initially but was getting a bit confused when I was setting up my keybindings, and this was before I got VR. I started working on the F18 and noticed right away that the keybindings didn't transfer over like they do for WarThunder, and that the terminology on some things is even different on the keybindings themselves. Since then I've pretty much stuck with the F18 although I haven't gotten very far outside of just running off of the autostart sequence and using the gun. I'll still tinker in the training missions though, try to get things ironed out at a minimum.
Nothing is stopping me, there's just a lot more involved in this vs. what I've played in the past and some things get very frustrating when I don't exactly have anyone I know to be able to ask for help on.