> Ten years ago was pre oculus rift. We weren't saying anything about VR headsets.
Rift DK1 was released in ~2013, and lots of gamers bought it throughout 2014. We got the first "consumer release" for the original Rift in 2016. I think its more than fair to say 10 years - we were absolutely talking a lot about Rift DK1 in 2014.
> Five years ago was pre valve index
Valve's first consumer VR headset was the HTC vive, released in 2016:
https://en.wikipedia.org/wiki/HTC_Vive
"The first-generation Vive was announced in 2015, as part of a collaboration with video game studio and distributor Valve Corporation, and implementing its VR software and hardware platform SteamVR; the first-generation consumer model was released in April 2016."