You sound like you have never tried to install any sizable haskell package ever... Cabal-hell was a very real problem, and an inordinate amount of time was spen

You sound like you have never tried to install any sizable haskell package ever... Cabal-hell was a very real problem, and an inordinate amount of time was spent by package maintainers to help people installing their packages, even on the IRC #haskell channel, cabal-hell questions would very frequently pop-up. Also, you FUD about Yesod is not true at all, they followed the PVP closely up until 1.1.0, as another commenter mentioned. Even with the PVP, you would basically have to nuke your cabal packages, or, when sandboxes finally came in cabal, you could use them. Stack completely removes some very real problems with building packages. Honestly, having read all your comments in this thread, you seem to be either a troll, or someone who clearly has no idea of the history of haskell tooling....