I am being pragmatic

Bitmain could pre-emptively fork themselves during an unknown 24 hour timeframe, with 75% of the hashrate and a pathological desire to destroy Bitcoin, why do they need to even pretend to be cautious?


We'd have very little useful time available to turn that situation around, but I strongly suspect disenfranchised miners would be only too happy to support the PoW change, once it's potentially too late.

I fail to see how that argument could not convince all who percieve they will lose out in a PoW change situation to support pre-emptive action.