[tome]

This is a standard that Haskell is held to a lot, but I'm not sure how robust a test it is. I never use programs written in Java, for example, and I use a program written in Scheme every week. That doesn't say much about their relative popularity, let alone their quality as programming languages.

Presumably I use server-side applications written in Java, but I've no way of telling. If server-side counts then most people with computers indirectly use Haskell via Facebook's Haxl project.