After almost 10 months and 19,000 km (12,000 mi) my SOH has dropped to 94.35%. The fall has definitely slowed with winter temperatures below freezing but still continues with a .01% drop every few days and an occasional rapid drop of .25-.5%. The fully charged capacity, according to Leaf Spy, is 96.2% SOC, 92.6% GIDS, and 35.9 kWh.
For those interested in cold weather range, I drove a 106 km (66 mi) round trip last weekend in -29C (-20F) with a 15-20 kph (9-13 mph) crosswind, an average travel speed of 80 kph (50 mph), and interior temperature set to 18C (64F). I left fully charged, interior preheated, with an initial pack temperature of 2C (36F) and returned with 2% on the dash and a pack temperature of 16C (61F). I had passed Low Battery Warning and was about 6 km (4 mi) into Very Low Battery Warning. I'm not sure how far away I was from turtle. The interesting part is LeafSpy still showed 6.4 kWh remaining. Does anyone have a good idea how accurate LeafSpy is at lower states of charge? According to the car, about half way back, it determined I wouldn't be able to make it home. According to LeafSpy I had plenty of range to get back - which I did without any problems. LeafSpy also showed that I used 29.8 kWh on the trip which was confirmed with a 30.11 kWh charge back up to full. It is disappointing the car wants me to believe I can only use 78% of the supposed 38 kWh originally available, or 83% of the currently degraded battery. A 6 kWh buffer at the bottom end seems a little excessive.
2018 Leaf SL, 43,577 km, SOH - 92.16%, Hx - 119.23, AHr - 106.39
2020 Model 3 Performance, 9,581 km