Heaps of you guys must live in a crazy black and white world where there's only 1 metric for measuring anything: "If it's not the fastest then it's not the right choice".Don't get me wrong Vega 64 is a okay card, certainly you can make the case for Vega64 over the 1080, especially with a freesync monitor, but there is no way to make the case for it against the 1080ti.
Back in the real world 1080Ti's cost more than Vega cards. So if we can open our minds a little we have another metric to consider our options: price! And at least where I live a 1080Ti will cost ~75% more than I paid for a Vega64. And even if it's only 25-30% more they still lie on the same price/performance level.
The next point is what we mean when we say "good enough" performance. Elitists here seem to think I'm trying to polish a turd when I say "good enough", but I totally mean that more performance will be mostly wasted. If you're not stupidly OCD about needing to run arbitrary max settings Vega cards can easily perform in the sweet spot for a 144Hz QHD VRR monitor: Averaging 120-130 fps Freesync will be a better experience than 25-30% higher fps with a 1080Ti and much cheaper.