Adding to that, even stuff like OOM errors _can_ be known states. It's not unreasonable for stuff like "one database per machine" to be able to adapt to the ava

Adding to that, even stuff like OOM errors _can_ be known states. It's not unreasonable for stuff like "one database per machine" to be able to adapt to the available memory. The point of "let it fail" is _just_ to drop the outcomes of your code's path in general use.