I hope Bitcoin's game-theoretic fundamentals work as intended and spamming is unprofitable and very costly. I assume that the attack has stopped because they realized that it failed to achieve their goals - make people switch to Bcash out of frustration caused by high fees.
I think that at that point they've realized that if they BTC goes down so does BCH..
The first spam wave worked for BCH and they've managed to become to become 2dn crypto in November but their mistake was that it happened in a bull market. When they've tried it 3 times as hard it had no effect, all the coins were going down and the gap between
BTC and BCH was never going to be bridged.
What if they would have done it at a different time?
But this is a matter of if... and nobody knows the answer.
a POW change will only make Bitmain and Juhan Wu stronger and much richer than they are right now!
you think they give a shit if you make their current equipment useless? not at all because you are not only making their equipment useless, you are making all ASICs useless. Bitmain will happily start building new ASICs for the new algorithm and starts selling new equipment to miners that already had ASICs but now they can not use them anymore.
to be honest I wouldn't be surprised if some day Bitmain pushed for a PoW change! practically it will create demand for their products!
Well, in theory, you could create an algo that would render not ASIC useless but mass production of ASICs barely profitable....
But this is almost impossible when you have a reward of 1800*7000$ each day laying there for the miners to grab.