The only way I can describe it is that when you put on the headset you no longer are sitting in front of a monitor you are sitting inside an aeroplane. It’s one of those things where people can be headstrong against it until they have tried it. My brother recently tried my rift, he is a dcs user and has flown aircraft. He was without exaggerating amazed. In fact he was not expecting the influence it could have on tricking the mind and was pessimistic about vr. He was particularly impressed when looking down from the side of the cockpit and the depth of perception and the feeling that you were indeed 20,000 ft in the air and those were his exact words. ,”you no longer feel you are in front of a monitor you feel like you are inside a cockpit”. Over time I admit you kind of get used to it and that initial amazement wears off. And I now long for some kind of motion influence, but what is telling is there is no way I could go back to a 2d monitor. And I would say virtually all people that have gone to VR say the same thing.
If you decide to do it you may experience some sickness. I did. Over a short period of time I overcome this and no longer experience the problem. Powerful pc giving good FPS is a necessity though.
This is my opinion of course and if people are still playing on monitors and still enjoying it with home build cockpits fair play to them. We all enjoy are own thing. If you’re not sure about splashing out on that kind of money see if there’s a way to experience VR in a flight simulator first to see if it’s your thing.