I won't say "MUCH MORE POWERFUL AND EFFICIENT than Ethereum GPU mining rigs"
because..
A10 Pro+ Miner (720Mh) @ 1300w
3080 (90mh) x8 720 @ ~1600W or ~2000w system included
not even x2 less powerful and efficient.
Actually 95mh a card so 7 x 95 is 665 at about 1700 watts
Vs 720 at about 1300 watts
The real problem is not that it works better the problem is too much hash will simply lower eth coin prices.
ETH could fix it by simply waiting 2 months and let all a10s sell out. Then alter the algorithm to 7gb dag. It would kill off a shit ton of hash .
The chances of that are next to nothing. But you never know. Maybe once the boss of eth would fuck with asic builders heads.
LOL.. but the ones who bought? Hehe If the asic makers already sold them then they already profited, the ones still in production will be recalled and upgraded to 8gb
If dag change is a soft fork then it is easier to implement but an algo change (progpow) is a hard fork and will put those asic makers back to drawing board.