> if you feel that your well-understood regular failure case is viable, then all your error handling can fall-through to that case.

This is my favourite line, because it generalizes the underlying principle beyond the specific BEAM/OTP model in a way that carries over well to the more common sort of database-backed services that people tend to write.

...and does no harm for unfixable bugs. It's the logical equivalent of "switch off and on again" that as we know fixes most issues by itself, but happening only on a part of your software deployment, so most of it will keep running.