I don't want to make assumptions about your metabolism, but I find that I actually need to eat food on a fairly regular basis, to the point that I would not characterize it as a "once off" purchase.

If the company I buy food from decides to ghost all their customers with 30 minutes notice, I can walk a block in the opposite direction and buy food from a completely different company. And I can walk a block further and buy food from yet another company. Any of these companies vanishing into thin air would only cost me a 10 minutes of my time at most.

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.

> Electricity and water are heavily regulated and often government owned, not run by Silicon Valley cowboys.

Yet, you still get Puerto Rico (electricity grid recovery failures of a few levels), and Flint (no clean water for you, because no).