And then on the other hand you have this guy with his 2014 Leaf with 50,000 miles that is still showing a state of health of 100%.
.
2015: Battery Data Report @ 100% Charge - Page 66 - My Nissan Leaf Forum
.
Blue 2014 SV
50,000 miles on 11/22/16
12 bars 284 GIDS
66.015AHr 100%SOH 101.15Hx 395.91V