>>378959724
>Index best
You need to do more research. The only thing the Index is best in is sound and high refresh rates, but it's beaten in the latter by the 5k Super. The Vive Pro 2, 8k X, or G2 in clarity by a sizable degree without costing crazy more, the former 2 already in the steamVR ecosystem. The Aero blows every VR headset out of the water in clarity and has unique lenses, pixel density over x2 that of the Index and vastly better lenses, but it costs 2000 dollars and lacks a microphone or built in audio outside some dinky earbuds. If you want absurd FoV(160 degree vs Index 108) then Pimax is the go to. The Index is still amazing in is on a plug and play factor but it's really showing its age at almost 3 years old by now in everywhere else.

As for treadmills, no not really. They all have a fundamental problem with moving anyway except for forward. They technically can strafe, but it and moving backwards use foot gestures, you either move your foot to the left/right and angle it up or behind you pointing down. The problem with this is there is a very small bit of lag between the gesture and actually moving. It's not large, maybe half a second or less when I tried it, but that's a horribly long time to react in Pavlov. Plus you can only move "Full Speed" in those directions, there's no careful movement like when barely moving the thumbstick. This makes it poor for when you need very small, precise movements which the treadmill can only do when moving forward.