Thats not quite true, unless the 3060 Ti counts as a high end card I guess. It was easily the most popular mining card of the 3000 generation, due its excellent MH/Watt compared to the others? And previous to that, the mid-range 5700 from AMD was the best, to the point where you could sell your 5700 to a miner and buy a new 6700 and have cash left over at some points.
I saw the 5700/6700 claim at the time, but I was never able to find someone willing to buy my 5700 for what a good 6700 was selling for.
If nearly all the 60-series cards sold for several months are considered high end cards, what are the low end ones? 710 gt's?