In terms of tooling, Haskell has one thing that AFAIK no other language can compete with: Hoogle. Hoogle is amazing. You tell it, in Haskell, what you want, and it tells you, in Haskell, what you can do. It's extraordinary. Someone attempted something similar with Rust, and I even tried to make a Noogle (Nim), but it just doesn't work the same in languages where there's a clear divide between "passing arguments to a function" and "calling a function." I find myself looking at tangles of Rust code with all its Result<Option<Box<SomeEnum<Nonsense>>>, Box<dyn Error>> and I yearn for a Roogle that provides the same level of utility as Hoogle.
Other than that, Haskell's tooling has no redeeming qualities. Nothing (pun intended). A lot of that can be blamed on the community's instinct to make something "innovative" instead of improving what already exists. I feel the author's pain.
But wrt. other tooling, I use haskell-language-server every day and it makes me so much more productive. Sure, it isn't perfect, but so much better than what we had just five years ago.
Other than that, Haskell's tooling has no redeeming qualities. Nothing (pun intended). A lot of that can be blamed on the community's instinct to make something "innovative" instead of improving what already exists. I feel the author's pain.