[thackney]

You are right, it did go on to include hybrids.

Seems like battery life is a much bigger issue for “pure” electrics.

If batteries many years later are at half the capacity, it would be a much bigger impact for a Leaf than a Volt. Half the range versus lower efficiency.

[LogicDesigner]

Yea, I've always leaned more towards the Volt than the Leaf. However, I doubt that we'll be seeing any half capacity Leaf batteries before the cars reach 250,000 miles (the exception being the early model Leafs that had problems in hot climates). For Volts and Teslas, I would put it at least at 400,000 miles. (here's some data)

The Volt has been on the road for four years and there seems to be a consensus among owners that there is virtually no capacity loss. People criticized GM for the initial price of the Volt but their engineering team seems to have pampered the hell out of the battery pack. Theirs and Tesla's packs are liquid cooled, unlike the Leaf.