With Link and MSFS, as well as X-Plane, there is some kind of frame timing bug that causes jittering and instability, at least on my system. Setting the graphics driver’s v-sync option to ‘Fast’ either fixes it or at least helps (even though v-sync settings should not make any difference for a vr runtime, which is supposed to override all of that). For both of these apps, the issue is not present when running through steamVR, for some perplexing reason. However, steamVR does still take away some performance headroom due to being an extra layer running, so it’s a win in some ways and a loss in others.
I made a post about the frametiming issue here with a video showing the framerate effects via the performance overlay graphs. You can do the same thing in MSFS and see the same result in its menu screens – a frame rate that will not go up to the native refresh rate regardless of available headroom, until v-sync is set to ‘fast’: