Next step for electric cars would be to address issues for non-home-owners (like me) and consequently can't find a convenient way to charge up an electric car. Hot swappable batteries come to mind.
Imagine swapping in a 10 yo battery for brand new battery. That would kind of suck.
The thing that will probably make things more tenable for non-home owners will be bigger battery densities. If you get 500 miles of range on a charge, then stopping by a fast charger once or twice a week wouldn't really be all that big of an issue. You don't even have to go to 100%, just enough to cover a week's worth of commuting.
The other thing that would make this better is a bigger source of public L2 or even L1 chargers.
But unless a reliable charger is at walking distance from my apartment, no electric car is going to work out for me.
You don't have to park your car for hours or walk. Assuming a fast charger is enroute.
Ideally, you'd pair shopping with charging, in that case electrify America chargers are often located in Walmart parking lots.
L1 and L2 chargers are more ideal for work or home parking. They'd be better for your battery in the long run, but a fast charger would do in the short run.
The alternative is more chargers in more places and bigger batteries. Chargers are actually pretty cheap, especially the 50 KW chargers (or less) that work well as destination chargers at offices, hotels, restaurants, malls, grocery stores and other locations. Increases in battery capacity directly lead to vastly greater #s of miles per day with lower charge times.
Swapping just isn't necessary or economic.
For cars, the way to go is wider charger network and scaling the battery capacity (horizontally or vertically).