@Robert M has done a great job explaining some of the challenges but it can be even worse.
US houses were never meant to carry such electrical loads. IAMN an electrician but my understanding is that houses were built with 30, 60, 100, 150, or 200 AMP services. 30 would be pre WWII. Some new McMansions 400 AMP. But many, many houses have 60. OTOH, England or the London area was pretty much gutted with the Blitz so most of your new houses around London are probably built in the mid 50s or later?
When I was young, we had no dishwasher. No one ever conceived of a built-in device that washes the dishes. Clothes came out of the washer and onto a clothes line. clothes Pins were a real thing. Wet clothes were dried outside. Modern dryers are 30 AMP 240V ALONE. You seeing the point? Microwaves? LOL. I replaced a stove fan with an over the stove microwave that pulls 1600W. 15 amp circuits are 1800W. I had to get someone in to put a dedicated 20 AMP circuit JUST for the microwave.
IOW, houses were NEVER designed for future electric loads. Who knew someone would invent a microwave? Or powerful stereo equipment? Or all the computing devices? Or people having a TV in every room?
The second issue is how the houses are heated and A/C. Back in the day no one had AC. Now it's everywhere. Houses can be heated with: gas (and gas stoves), electric, oil furnaces. I remember a COAL furnace, yes a coal truck dumped coal and you had to shovel it. Electric is nothing but huge toasters talking big energy. The biggest energy pulls, in order, are when its all electric:
- Heat (and or A/C)
- Hot water heater
- Dryers
So if the house has gas, then you can get away with a much smaller electric service because gas is doing the heating for the house and water and clothes.
So now you want to put in 64 amps, 50 amp draw 240V. Many houses certainly can't handle it if they are all electric. So now the big money comes. Increase the service to the house and a new panel.
Then as Robert M said, you better hope the panel is close to where the charger is going. I know mine would be on the entire opposite side of the house and the lines to be pulled would be long.
IOW, its not anywhere as simple as it sounds.
What you see in that initial 1% of vehicles are the early adopters with low hanging fruit. The easy stuff. It in no way represent the bulk of the US issues with electric charging at home. And that ignore the electrical pull from the grid if everyone plugged in.
So for example, its night time in the winter and 12F here. Thats -11C, Heat pumps don't work good below 20F. So the giant toaster goes on. That can pull 50 amps. Taking a shower? Could be 30 amps for the hot water heater. Dryer on? 30 more amps. Then there is the background load, the bare money to survive. That could be the refrigerator and every device in the house that is always on and you would be amazed how much that adds up. Just look at all the little LED lights on in every room, all a parasitic draw. Adding another 50 AMPs to charge ONE car? I think it will overload many houses that were never intended to have such a load. But the EV advocated NEVER talk about that. 🙈🙉🙊
These are sunk costs and the time to the breakeven point has to be calculated. If you get rid of the house, or car, prior to breakeven, who want to throw money away?