I suppose I should contribute to this thread. I saw gradual capacity loss until about 10 months ago (well over 60,000 miles),. Now there appear to be several weak cell pairs getting progressively weaker (based upon Leaf Spy data) which are limiting the energy storage capability of the full battery pack, and thus limiting usable range. The weak cells reach minimum voltage and cause turtle followed by shutdown even though there is a lot of energy left in the remaining cells. The weak cells reach maximum voltage while charging before the other cells so they also limit maximum charge of the pack.
The internal resistance also appears to be increasing over time and that is causing the battery temperature to be significantly higher this summer than during the previous 4 summers. In the past, the battery temperature would gradually cool off during highway driving after a DCQC, but now the temperature increases while driving on the highway. The odometer currently indicates 80813 miles while the car is charging at a DCQC station since I can no longer make my round trip commute without charging. The higher internal resistance and weak cells also limit regeneration and cause slower charging on DCQC.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL+ purchased 8/10/2019