Also, using general purpose hw is inherently more decentralized, enabling small scale mining which would make pulling off something like that successfully a lot harder.
General Purpose Hardware is by default more decentralized due to there not being monopolies or barriers to entry. This is a side point, but do you favor BCH changing the mining Algo?
The bch community looks at the algo change just like how the useful idiots of Coretards looked at the capacity increase back then. We'll see where this attitude leads...
Changing the algo is not conceivable for BCH. Getting consensus would be impossible. (context: Just fixing the DAA reads like a civil war story.) Build better faster on new turf.