Or even better we could build cupboards in the aparments and people just keep their personal supply. /s

All my shelf stable products have been in my pantry for a few months before I even open them. You can do FILO yourself and have always a nice emergency supply and it can even cheaper because you can buy the stuff on sale most of the time. The problem is that many people just buy day to day and already have a problem when the shops are closed for a holiday they haven't anticipated because they buy just in time.