Just a datapoint for my 2018 Model 3 RWD w/26k miles - manufactured in April 2018, so slightly off-topic for this thread given that Tesla has gone through at least one chemistry tweak since then.It definitely helps, but it's less clear whether it will actually have any effect on the actual rate of capacity loss for Tesla users in any substantive way (we don't know what the dominant factors / contributors are for Tesla packs).
TeslaMate reports that my car is parked 97-98% of the time for the past few months - It probably isn't parked for less than 93-94% of the time if I were still commuting (about an hour a day of driving at most), so calendar based aging of the cells is going to be the dominant aging factor.
This means you want to keep the cells at a low SOC and low temperature. Over the life of the car, I've probably put no more than the equivalent of 100 cycles on the car if I was going from 100-0%, but many partial cycles.
I've only been really keeping track of reported capacity accurately for a few months thanks to TeslaMate and ScanMyTesla, but it reported 310 miles when new. In Mar 2019, Tesla bumped the range up to 325 miles, but I never quite hit that number. No surprise given the relatively rapid capacity that is apparent the first year. I saw 320 miles or so, but it was always around 310-315 miles for the next year when COVID hit.
Pre-COVID, charging behavior was typically charging to 70% (~220-225 miles), then to recharge at around 30-35% (~100 miles) a couple times a week. Optimal strategy would have been to charge daily or every other day to 50%, but I'm too lazy to plug in every day and I was basing my expectations of battery life on the Model S and X which appeared to resist capacity loss extremely well even if you charged to 90% daily.
Since COVID in the last 1+ year range has dropped faster and has settled to around 295 +- 5 miles for the past 6+ months, despite charging mainly to 50-60%, which in theory should be better. I attribute most of this to the BMS losing calibration a bit, but who knows. If you take the BMS at face value, my car is about 10% down from new which seems to be typical. TeslaMate reports the average SOC to be 45% over the last few months.
What would the capacity loss be if I always charged to 90% instead of 50-70? No idea. But even if it were the same, I would probably still only charge to 80-85% since at 90% there is some loss of regeneration in sub 70F temperatures which is annoying.