Most of those feature in this list of recommended defaults https://github.com/commercialhaskell/rio#language-extensions https://github.com/commercialhaskell/rio

Most of those feature in this list of recommended defaults https://github.com/commercialhaskell/rio#language-extensions https://github.com/commercialhaskell/rio#language-extensions which is cited as an example in simplehaskell's page on recommendations. https://www.simplehaskell.org/language-extensions.html https://www.simplehaskell.org/language-extensions.html From what I've touched of Haskell, I'd think e.g. OverloadedStrings makes Haskell simpler to use than leaving it out. (And OverloadedStrings certianly doesn't seem ego-inducing). Simple Haskell's page on extensions also isn't advocating for anything too concrete. Just an emphasis on pragmatic, simple to maintain code. IHP's landing page even claims "Don't worry, you don't need to know much about Haskell to get started, you'll learn it along the way". This seems to be in the spirit of simple Haskell, although I'd be curious to hear about what parts seem not-simple.