I can’t physically charge a car at home. … and I (usually) can’t charge at their office.

Certainly this is key. Your car is sitting unused for hours at these locations, so even a relatively slow charge would be convenient. We definitely have work to do deploying these everywhere.

My point is more that every workplace, almost every home already has sufficient electrical service to charge for most car uses. We have the technology and it’s naturally broken down into many smaller less expensive projects. It’s much easier to build this out than to create an entirely new infrastructure around disposable batteries, redefine all cars and then scale out. And the technology already exists. But we still have to do it