I had prepped well but there's always a few things you need and crave. In those times searching the big stores you will be unlucky.
However the local butchers, corner shops were ok. Plus you discover some treats that you don't get in the supermarket (Lorne sausage, freshly baked rolls/baps/barms/whatever you call them locally).
Can't wait to see what economists research on shopping habits over the year 2020.