Evs will absolutely cause a problem but it's not really a difficult problem to solve because it's not a lack of power generating capacity that's the issue, it's a lack of infrastructure to deliver that energy. We don't have enough high voltage lines or at least we don't have enough high voltage lines in the right places to be able to easily put charges in.

But the government have known about this issue for literally decades and have done nothing about it. It's a 100% solvable problem it just requires spending some money. So obviously it hasn't been done.

Heat pumps are actually good for the grid though because although they use quite a bit of power, but still a lot less than resistive heating, they don't have huge energy drawer. They use a lot of power over the day, but they tend to sip it out over the course of the day rather than in one big draw around 5:00 p.m. and that's much easier to plan for.