There were several straight pages of arguments about 80A/100A/125A/200A service, and implications that people with less than 200A service are going to have issues with charging an EV. These older service panels < 200A are mostly installed in older and smaller homes, where overnight load is likely very low. I can't imagine there are actually many cases where there's not 30A to spare for overnight charging of an EV.
Daytime charging is another issue, as it is realistic that combined household load may total over 50A, before plugging in the EV. However, I'm living in over 8000 sq.ft., and it's rare even here to see our daytime load peak much above 50A. There are certain fixed loads irrespective of the size of the home (electric range, electric clothes dryer, electric water heater), but many other loads scale with the size of the home (heat pumps, lighting, number of occupants, etc.).
If I lived in a home with an 80A or 100A service, and wanted to avoid an upgrade, I have very little doubt I could make it work. It would mean more careful planning on when I charge, or making sure no one runs the clothes dryer when I need to do that odd daytime boost.