The Youtube channel Technology Connections has an interesting video where it describes a successful transition to a fully-electric house while remaining on a 50 amp electrical connection. (it requires a smart circuit breaker)
I’m sure we are outliers, but still.
Put another way: growing up with incandescent bulbs, I remember light switches that would turn on 6-8 lamp track lights. That’s half the current our EV charger draws. We had a space heater that drew more than our EV charger currently does.
Houses and neighborhoods are still built with electrical systems provisioned for pre-LED, pre-induction/heatpump workloads. They certainly have enough slack for everyone to plug in a level one or two charger simultaneously.
(Personally I don't expect this will be that big a deal, since switching to EVs is something that happens one household at a time over many years. So, it shouldn't come as a sudden shock, and its something the utilities can make long term plans about. It just means power utilities need to be on the ball about not putting off infrastructure upgrades, and it means somewhat higher electricity prices for residential customers.)