No one said it's what they would wish to know before they start.

Take it from someone who spent 10 years on and off learning Haskell: It's a guide to navigating the boobytrapped minefield of the Haskell ecosystem, from the difficulties of installing it for the first time, to the confusing type theory.

Those aren't 7 plugins to choose from. Those are 7 plugins you should use all 7 of because there is no unified coherent Haskell IDE or plugin, but there are a dozen other broken ones that look good in the catalog.

Much the same with libraries. You need a guide to tell you which ones are usable and which are abandoned experiments, since both live side by side in the main repos.