My 2011 A8 GRiSO was rollerized with the B-kit this winter.
I only drove approx. 7000 Km in 7 years and the oil (plus filter) was changed 3 times in that period.
My old tappets look similar to these:[You must be registered and logged in to see this link.]
so the wear has aleady started (DLC-damage only).
Thanks to the warnings in this forum I decided to do this rollerisation even of the low mileage of my GRiSO.
It was the right point of time.