FlyInside flight simulator is now on steam early access and comes along with a big update:
I bought it directly from their site a month or so ago, and have had a good time with it. The performance in VR is fantastic (note: you can play this 2d as well), the game is smooth and pain-free to operate. The planes are also really nicely detailed. The one big drawback up until now was the very simplistic WIP scenery, but in today’s update that has supposedly been vastly improved. I have yet to test it but looking forward to doing so.