When I read "interchangeable batteries" I imagine a pretty simple procedure: open hatch, pop out old battery, put in new battery, close hatch.
When I read "install car parts" I imagine a procedure at least an order of magnitude more difficult requiring knowledge and experience working on automobiles.
Changing batteries is a task nearly all people have done at least once by the time they start driving. If changing the batteries in your car is as easy as changing the AAs in your Game Boy then I imagine many people would be willing to do it without thinking twice.
If it is truly that simple then I think the risk of screwing it up is also considerably less.
I mean, you know, it's not the same size and doesn't serve the same purpose, but today people's cars have batteries in them and you can walk into Sears and buy one. I assume the battery for an EV is huge and not conveniently located though.
In Germany at least cars are checked and licenced by TUEV at regular intervals and after tuning (but not after servicing?). The owner has to pay for the check up, too, if I remember correctly.
In the United States this is up to the individual state, but typically you have to have a once-yearly inspection of your car. Some states will check that various parts of your car are in good working order, others basically want you to not have a check engine light on or be spewing too many fumes. There's no responsibility to even notify anybody that you or someone else has modified your car and there's no problem as long as the modification itself isn't illegal (even then people sometimes just pay the tickets and keep driving around with illegal modifications).
I spent a year in Japan and the contrast between Japan in the US as far as the average age/condition of cars you see on the road is quite striking.
When I read "interchangeable batteries" I imagine a pretty simple procedure: open hatch, pop out old battery, put in new battery, close hatch.
When I read "install car parts" I imagine a procedure at least an order of magnitude more difficult requiring knowledge and experience working on automobiles.
Changing batteries is a task nearly all people have done at least once by the time they start driving. If changing the batteries in your car is as easy as changing the AAs in your Game Boy then I imagine many people would be willing to do it without thinking twice.