I have been spending most of my time enjoying flying lately, and getting more and more reluctant to try new things. This post made me plug in my Index one more time.
I have to say, I agree with almost everything said. The latest SteamVR does make a huge difference. Being able to lock FPS at 20 or lower means almost everyone can get a smooth experience. And the Index does have all the advantages mentioned by @CptLucky8.
However, I am still going back to the G2. Yes, you can push through more pixels with Steam OpenXR, but some of those get wasted on the Index anyway. Super-sampling won’t make everything in a A320 legible; only a high-resolution headset can can.
The real deal breaker for me is Steam motion smoothing, which is far inferior to WMR. Some of the words I read from other posts but could not really understand – wobbling wins, vaseline effect, ect – make sense now. With WMR motion smoothing, the only artifact I notice is around the propeller area, which makes it much easier to manage and ignore. With SteamVR (and Oculus, by the way), they are everywhere. Even the instruments wobble when you shift you head left and right.
Lastly, the contrast and color of the G2 make everything more realistic to my eyes. The Index is too saturated, almost completely washing out the subtle effects of ambient occlusion.
Now that I have spent significant amount of time with all three major headsets. I can say definitively: G2 is the best headset for MSFS 2020.