It seems to me what he calls "lighweight data modeling" is a synonym for "untyped data". Use ints, strings, arrays and maps to model everything (his JSON exampl

It seems to me what he calls "lighweight data modeling" is a synonym for "untyped data". Use ints, strings, arrays and maps to model everything (his JSON example). It's great for prototyping but when you start getting big, you really need to tighten these models down to real types.