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.