I ended up selling the Reverb G2.
The WMR inside out tracking had a number of issues.
1. In Rally with motion if I was turned looking into a corner and hit a bump it would sometimes recenter leaving me turned sideways.
2. For room scale games, the height was never right. With the Index, calibration was simply placing the headset on the floor and from that point on it had the correct height for any player. With the G2 you were supported to hold the headset out to calibrate height and there was no way to get it right. Even the Oculus Rift had you calibrate the height while you were wearing the headset which would also work.
The WMR hand controllers are junk compared to the Index controllers. However I understood that I could pair my Index controllers to the G2. So I purchased a couple USB dongles for my Index controllers and went through the calibration which sort of worked, but was very painful and I could never get it quite right.
The G2 headset was comfortable and lighter than my Index, but the off ear speakers are not nearly as adjustable so it never sounded quite as good because I couldn't get them positioned as well.
The resolution was excellent in the center of the lenses, but the off center blur even with the FrankenFOV insert was very distracting. I lost my feeling of being in the car. It felt more like I was looking at a pretty picture from inside the car. I'm thinking that's because of the narrower field of view and how blurry things got if you looked to the sides of the lenses. I was obviously disorientated wearing them and my driving was faster when I was wearing the Index.
I sold the G2 at a slight loss to someone over seas who also has a pretty serious sim rig, but who had never experienced VR and he wanted try it out. The G2 has gone on sale in the US as low as $299.99, but overseas it is much more expensive and doesn't go on sale. I was very honest about my experiences with the headset and he still wanted it.
I did briefly consider the Varjo Aero on sale on Black Friday for $1699. It gets some excellent reviews and my 4090 could drive it pretty well. However it also has a number of draw backs. I know people who have tried out the Vive Pro 2 and couldn't live with it. There is the Pico 3 and Pico 4 that I'm not interested in. At this point I'm still waiting for Valve to introduce their replacement for my 3.5 year old Index but nothing has been announced and while there are many patents and rumors, there is nothing concrete.
I did recently get a Leap Motion hand tracker that fits into the "frunk" of my Valve Index. It's for use in flight games like DCS and lets you select cockpit controls that you can see in VR and press buttons or turn knobs etc.. I was able to get a small micro USB to USB-A adapter so that it can plug directly into the USB connector in the frunk.
The video below shows how the Leap Motion works in DCS.