> "What part of EVs is "rapidly advancing technologically"?"

Battery capacity, motor efficiency (getting more range out of the same battery), charging rate (800V architectures for example that let you charge > 150kW), battery chemistry (wider operating temp envelope, affects charging and driving efficiency depending on environment)... the list goes on.

The batteries are also getting cheaper - which is to say for the same $ you're now (generally) getting a larger battery.

> "If so, why aren't used dealers just including a battery swap in the price?"

Because the batteries are in fact not swappable from one gen to the next, because the power electronics around them are different, peak current draw is different (and that depends on the motor it's mated with!).

Like I know it's tempting and attractive to imagine EVs like regular cars with some giant-ass AA batteries installed on them, but that's not how they work! The battery is specced as a unit with the entire electrical system and drive motor options!

The battery electronics aren't necessarily all that complicated:

https://www.youtube.com/watch?v=sZHN3fjDtpc

The precharge resistor has to be reasonably matched with the devices connected to the battery though.

And of course there could be additional converting electronics for charging or whatever.

If you look at EPA efficiency in 2020 and 2025, it hasn’t really moved that much for the same class of vehicle.

> Like I know it's tempting and attractive to imagine EVs like regular cars with some giant-ass AA batteries installed on them, but that's not how they work!

Come on, we all know the big Christmas toys would always use those fat C batteries that we never had enough of.