Last summer I replaced all 4 rotors and while they were under the min thickness limit, I could not find any evidence of cracking. Porsche knows brakes.
But won't it be at the expense of an increased pad wear rate?
Not really, the rotors are not more aggressive in any way, just harder.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein