Foxholer
Blackballed
Look at the below example of Master Luke.
Has he rolled his wrists?
Who would know - as it's a still photo.
And JO. I disagree with you - but 'only just'. The right wrist moves further than the left one from just before to (from position 6 to 9 in some coaches terms) so has to move around the right one, therefore there is a 'roll'. However, it is (well should be) only enough to get the toe of the club pointing straight up at position 9.
And you/Crossfield's assertion about there being no roll breaks down (just) when you realise that a roll(around)-less rotation -a stiff-wristed one - wouldn't hit the ball very far. It's the combination and synchronisation of all the elements of a swing that provide the optimal result.