That is incorrect. Covert AsicBoost does not use version rolling, but instead uses a method called "merkle grinding." Merkle grinding does not produce different block version numbers like version rolling does, hence its "covert" label. Gregory Maxwell described this method in much greater detail here.
Then I stand corrected. Maxwell's doc bookmarked for future reference.
With 'merkle grinding' no one will use it.
Odd how gmaxwell in his "Wed Apr 5 21:37:45 UTC 2017" message goes on about:
Reverse engineering of a particular mining chip has demonstrated
conclusively that ASICBOOST has been implemented
in hardware.
The odd part being that I posted about the S9 having asicboost in July 2016 in the S9 hardware thread.
https://bitcointalk.org/index.php?topic=1493601.msg15634328#msg15634328I guess he lives in his own little world and doesn't take note of what's going on.
Like segwit ... the great solution to Bitcoin ... that has yet again failed in the last 24 hours to do what it should with transactions ...
They should have implemented BIP100 like over 70% of miners voted for with their coinbases.