LFP cycle life vs NMC: real-world data?

Been going back and forth on this. Lab tests show LFP lasting thousands of cycles, but real-world NMC seems to be holding up fine too. Curious if anyone has long-term data from their own vehicle—especially those doing regular DCFC or frequent high-SOC holds. My NMC pack lost about 6% after 40k miles, with mostly Level 2 and weekly fast charges. Would that be worse on LFP? Also, does the flat voltage curve make accurate battery health reporting harder? Trying to decide on my next EV purchase.