Early Leafs would apparently get their batteries cooked in Phoenix because no active cooling. We’ve got one of the first ones that rolled off the line, and eight years of Seattle weather has ours at ~12% degradation. We otherwise haven’t done shit to that car except drive it. So from my POV, I read the issues with Tesla’s and just shake my head.

All those old Leafs with "horrible battery degradation" from the USA are now taxis here in Ukraine. A car model needs to be VERY reliable and maintainable to be popular as a taxi here, so it's a high praise for the Leaf. The batteries don't degrade straight to zero, they are still very usable. Battery degradation only helped to lower the price of an otherwise very nice car.