Only ally clutch part I've seen get worn (and it took a long time to do it) was teh steel fingers of the plates chattering on the baskets, causing wear troughs, leading to uneven and sticky disengagement. Easily sorted with a file for another 100,000 miles.Simple answer... aluminum is actually pretty durable. Cast aluminum is actually one of the softer alloys, yet our pressure plates endure.
In other words, nothing to be concerned with.