When I need more food I'll make another once off purchase. If the place that had lunch today has boarded up it's windows tomorrow I'll just eat somewhere else.

When I need more food I'll make another once off purchase. If the place that had lunch today has boarded up it's windows tomorrow I'll just eat somewhere else. If I bought that food from a supermarket it doesn't disappear from my pantry when the supermarket closes down. My food supply is a self organising network that can route around any single point of failure. This is about as far removed from SaaS as you can get.