Originally Posted by Christian and Beccy

No, 50% that know whats right do it and 50% that want to save £50/can't be bothered don't.

Cerametallic clutch material is SO much harder than normal clutch material, it simply doesn't wear anywhere near as quickly (unless the clutch is slipping, which obviously isn't good).

Now imagine the cross-section of a worn flywheel (just like a worn brake disc), with high spots. The clutch only contacts these high spots until it wears to follow the mirror-image of the flywheel. However, the Cerametallic material takes AGES to do this and in the meantime, it might only be contacting 10-20% of the flywheel, so never really grips properly from the word go.