It's already like that if you look at it on a country-by-country basis, and rolling blackouts have been a thing for a long time even in developed countries, even if their use is for a different reason.

And in combination with an energy budget it's more a matter of whether you need continuity or if you can get by and save some money. I've lived in places where energy delivery was flaky an intermittent and everybody gets by, the only problem is with industrial processes that are hard or even impossible to restart, for everybody else continuity can be optional, especially if there is some possible prediction of when it will be available and when it will not.