Interesting point of view. Indeed, you probably want things to not be available 100% of the time. This forces you to see how resilient things really are.

Depending on the ecosystem it's more or less easy indeed. Let's remember that error handling is one of the hard problems to solve.

No, don't go assuming you can use disks instead of ram. This is not what it is about. It shows ways to get more out of your disks though. It's not something you always need, but sometimes it can be a worth endeavor.

Clearly something is brewing right now. We're seeing more and more people successfully switching.