Oh, option types! I don't know Julia or C#, so never heard this called nullability before. On any case, as someone else pointed out, OCaml had supper for optio

Oh, option types! I don't know Julia or C#, so never heard this called nullability before. On any case, as someone else pointed out, OCaml had supper for option types built in, through sum types. I agree that sum types are indispensable in a modern programming language.