There used to be a book that would come out every year in Canada called Billy’s Best Bottles. It’s premise was exactly what you just said: that we basically are living in a golden age of wine, where even cheap bottles of wine can be incredibly good. Not only are many cheap wines good, but he also identified that the upper end of wine, for most people, need never exceed about $35 a bottle because the vast majority of people in blind taste testing can’t tell the difference between a good $35 bottle and anything more expensive than that.