not to be mean... st-anger likes questions like this in the porsche Q+A section... just keeps porsche central a wee bit cleaner; and easier to browse +learn.
that said
i would think its tempting to drump the clutch in a sportscar, supercar, or hypercar like the CGT... and letting the clutch engage from high rpm like 8000 cant be good for any clutch, even a uber strong super small carbon clutch...
under normal usage, my guess is the CGT clutch would outlast the 187,000 mile (300,000 km) distance... but who wants to drive like the old lady in the 5 speed civic?
that said... porsche expects thier costomers to take thier cars to tracks... and while things like pads and roters may be used in a single outting... you have Endurance winning technology all over the CGT, as well as other P cars...
under testing @ NS... i know they did quite a few miles there
and its said that every 1 mile there, is like 20 miles in the real world worth of wear and tear... and i think that WR tested one CGT somewhere about 30,000 km... but i dont know what kind of parts needed to be replaced besides tires/pads/rotors/fluids.
mostly, i would expect such a clutch to fail from repeted hard launches, and overextending launch attempts...