* Significant improvements in error message readability and 
      content, including facilities for libraries to provide custom
      error messages, more aggressive warnings for fragile rewrite
      rules, and more helpful errors for missing imports.

I'm really excited about this. Any push towards more decipherable error messages should be huge in increasing adoption (which leads to more awesome libraries and opportunities to use it for our day jobs).

I still see plenty of errors that remind me of this post. https://izbicki.me/blog/error-messages-in-ghc-vs-g%2B%2B.htm...