[joshlemer]

But then ironically, the problem with relying on programming language type systems is that they don't scale (beyond the boundaries of a single process). As soon as you are crossing a wire you have to go back to runtime validations.

[nightski]

Throwing out type safety simply because you have unverified input is a little silly. It's trivial in most statically typed languages to safely turn input into a concrete type (or an error if it is invalid) at the edge and meanwhile maintain type safety throughout the rest of the code.