It’s not just restarting it that’s difficult. There are the side effects like what happened in NY: https://en.wikipedia.org/wiki/New_York_City_blackout_of_1977

> have some cash at home

For maybe the first 24 hours at a grocery store, and then not so sure. Would your neighbors sell you supplies and food? Maybe not? And so many places now depend on cashless transactions and doubtful they have pen, paper, lockbox, and safe as a contingency plan.