It’s all a question of personal taste. For some people VRR is not a game changer because MSFS is not a First Person Shooter. And VRR is not perfect too, because if the game chugs at a busy airport with a heavy add-on, it will chug even with VRR running.
But, speaking strictly for me, let’s say if for any reason I have to buy another 4K TV, and I couldn’t afford one with VRR, then I would choose a cheaper 1080p instead.