[AndrewO]

I feel like something similar could have been said about Xmonad. Yet, through its configuration and extension mechanisms, it's become a gateway for a lot of people wanting to learn Haskell. This niche isn't likely to fragment as long as it's made up people obsessively scratching their own itches.

[dons]

xmonad was written in Haskell because it needed to be small, fast, but safer than C.