Bjorn Nyland ran some tests on 14 month old Model 3 and came up a 6% battery degradation.
"The short answer is that after 14 months and 60,000 km (37,300 miles) the car lost some 6% of the battery capacity (although some 2% might be related to a previous software update)."https://insideevs.com/news/428880/tesla-model-3-battery-degradation-test/
Nyland uses fast DC charging 64% of the time.
His degradation pretty much matches mine, on the same curve, with mine at 11 months and 25,000 miles and showing 5% degradation averaging between TeslaFI.com measures, 4.3%https://imgur.com/y9IFMFm
And StatsApp's 6%.https://imgur.com/hXnUjwH