There's not only tooling and reliability. Don't forget performance, too. Knowing at runtime that a memory word represents, for instance, an integer rather than

There's not only tooling and reliability. Don't forget performance, too. Knowing at runtime that a memory word represents, for instance, an integer rather than a reference to a struct that contains both a type tag and a reference to the actual value, makes a huge difference. And I'm not even mentioning the inlining possibilities.