if his asicboost is rendered invalid, doesn't that make all his ASIC+asicboost hardware useless ( totally useless) ?
As I understand the whitepaper, yes it would because the logic gates for avoiding the optimization have been eliminated which makes it 20% more efficient.
All those who own Bitmain hardware for mining SHA2 coins, must fight SegWit.
Note someone disagrees with my assumption and I am asking for clarification:
https://www.reddit.com/r/Bitcoin/comments/63otrp/gregory_maxwell_major_asic_manufacturer_is/dfvz5g2/
@gmaxwell assumes but isn't sure:
https://www.reddit.com/r/Bitcoin/comments/63otrp/gregory_maxwell_major_asic_manufacturer_is/dfvvcdv/
And another interesting comment:
Because if Bitmain can't do it covertly then if they either can't or can reconfigure via s/w to do it overtly then their customers (who have the same boost capable hardware) will either not be at an efficiency disadvantage or they demand that they receive the software to also be able to do overtly.
But what if Bitmain release the s/w for covert boosting anonymously, then their customers might fight the BIP, because their customers might reside in jurisdictions where the Western patent applies.
I wouldn't be surprised for them to turn on the covert version!
A HF war seems possible if this BIP is activated on a flag day.