[TylerE]

This post kind of sums it up for me. No, I'm not thinking about invariants. We're talking about writing a web app here. Typing is pretty meaningless when 99.9% of your data is just strings.

[Peaker]

If 99.9% of your data is "just strings", you're probably Doing It Wrong.

[TylerE]

Again.... web app.

[Peaker]

Example web app: http://www.yesodweb.com/blog/2012/04/yesod-js-todo

How many Strings do you see there?