I don't get why so many people are so negative about Vega/AMD all the time, I mean I understand why the Nvidia fanboys always rag on Vega for using all the worlds electricity and melting the icecaps, and I can understand some AMD fanboys being upset that it wasn't the Volta slayer Raja built it up to be (lols) but seriously.
The reference V64 currently in my office rig is faster in the stuff I play than the GTX1080 in my second rig and uses the same power as the aftermarket 980ti in my main rig. It's hardly the destroyer of worlds some people make out and it's definitely a marked improvement on the supernova that was the Fury X.
Yeah some of the AIB V64 cards will probably use more power than reference putting their energy consumption on par or ahead of the AIB GTX1080ti's, but it's hardly the end of the world. Some people make it sound like its going to quadruple their electric bill or burn their house down when in reality the added power draw and heat aren't really noticeable over any other high end card of the past few years.
It's a combination of several factors : vega came out late, was overpriced at launch, AIB design are still unavailable, and the combo speed/power isn't really impressive, while having a complicated design that make them harder to make.
Vega is actually just like the radeon 290/290x, but at least those were sold at a decent price, and had far less issues overall so people looked over their downsides more easily.
If Vega would have launched one year earlier, with a decent msrp, I bet that it would have been just fine.