So the way I’m reading that is either things are near the peak of their efficiency, or that companies aren’t focusing on that.

But regardless the case. The biggest increase in range is due to an increase in battery sizes, but it’s also at the expense of weight.

Does fleet efficiency here mean a manufacturer's lineup measured to CAFE standards? As in: Chevy makes both the Bolt and the Silverado, so you (roughly speaking) multiple each vehicle's sales numbers x mpg and divide by total number of models? If so that would suggest that every other car would have had to get less efficient (or much bigger) in the last 15 years. I know giant trucks are a trend right now but that still doesn't seem right.

The big GM batteries are outliers. The Hummer has a crazy range but they don’t bother with efficiency unfortunately.

2011 is basically just the Nissan leaf, right?

I was looking for a like-to-like comparison, but Noone really makes 24 kwh bevs anymore, so I had to compare the 2014 model S p85 (85 kwh) to the 2026 genesis gv60 (85 kwh) to see what the same size battery does. According to the link https://www.fueleconomy.gov/feg/Find.do?action=sbs&id=35994&id=49653&id=49654 the new genesis does significantly better despite weighing more and being larger, BUT almost all the gain comes from city driving. So the efficiency might actually be from just improving the regen algorithms

(Gv60 - 4900 lbs, ModS - 4650 lbs)

But it's also hard to know if the epa testing methodology changed, because articles from around 2014 claimed 265 mile epa range, but the site shows 242.

Edit: oh the 265 vs 242 is single vs dual motor, dual motor is the better comparison