What Is Durable, What Is Not Durable?

Durable is somewhat in the eye of the beholder. Durable means, if i did it and i come back later to see if it's there, it's there,. For whatever that means, right? And so now you have to think about how i do work across pieces where they may or may not land in the same place. As these systems get bigger, sometimes of the servers holding some of them will be broken.