Earlier quoted context omitted.
There is mooooore than enough spare grid capacity to deliver the electricity to electrify homes. We size the grid for peak capacity, not for average capacity, which means that there's a very low overall usage amount. And the big drivers of additional electricity, heating and transportation, are easily shiftable to non-peak times. And as we have smarter devices, and more time of use billing, load shifting will be easy…
Not at all. Grid is not ready for this it need significant capital upgrades. Yes its designed for peak load but the load profile is changing significantly. And no you absolutely cant just load shift away heating and transportation of residential homes. That isn't cost free and we don't even have the projects in place to manage that yet.
Heating is similarly trivial to load shift; heat or cool a little extra before the peak, stop during the peak, and then pick up afterwards. This goes for both space and water heating.
Do you have any evidence about what upgrades are needed? I have a feeling that since you are so wrong about load shifting, that your intuitions about the grid may not be completely ok mark either. The grid upgrades I know about are for long distance transmission, not anything for distribution at the residential level, as we are discussing here.