Interesting, I’ve got the same old XT’s fitted to my DH Bike, with a bit of heel rub, not sure how I’d gauge the level of wear without taking a hacksaw to them.
Just goes to show though everyone blathered on about needing steel pedal thread inserts to make cranks sufficiently “tough” only for them to be eroded over time by riders socks…
Probably not the predicted failure mode when they were designed…
I think I might start looking a Heli-tape for my next pair…