The GeForce 1080 Ti came out 3 years ago, and I would definitely argue that it's still a card that's kicking butt.

Granted, the poster that said his 3 yo GPU is kicking butt also said he paid $300 for it, which could mean he has a GTX 1060 or equivalent AMD GPU. A 1060 is definitely powerful enough for VR, as it's performance is only slightly lower than the GTX 1070 that I use for VR.