Elixir Best Practices: Structs, String-Keyed Maps, and Atom-Keyed Maps

The conclusions reached here seem to conform strongly with what I've discovered "the hard way" in both Elixir and Ruby-land.

It also gives me a better idea of when to switch from "bag of mapped values" to a Struct. Great!

I'd further add that the "binary_to_existing_atom" function may make it possible to both take advantage of atom keys AND prevent DDoS attacks, assuming you are whitelisting the keys you expect somehow.