Well Index is done now anyway... The tech has moved on, what we all really want to hear about is Index2/Deckard from the Valve camp nothing much from CES unfortunately I think we are still 1yr away
I would love to see Index2/Deckard.
But as far as the tech moving on? Index still sells well, demand is still there.
For some, it has the best controllers (despite reliability issues with the thumbsticks)
It has highest FoV of any
entry level wired headset.
Uses SteamVR tracking which hasn't been beaten by anything regarding full body tracking / 360 tracking
Audio is best in class
Comfort for most is optimal
Ideally it would come down in price to reflect its age, but it's by no means "done" unless you're looking only at resolution (HP Reverb G2, but WMR), only wireless (Meta Quest, but Facebook, comfort, and compression), only FoV (Pimax.....), only lens (Varjo Aero, no audio, high entry price).....
The Index still ticks enough boxes as a capable allrounder to keep it up there with the current release. Perhaps the next Quest Pro offering will finally persuade Valve to lower the Index price. Until then, index keeps selling.