The situation must be differentiated by language/environment. The suggestions for Haskell are certainly not bad. They hold, too, for many systems programming.

For scientific coding, comments should align with the underlying theory for the code: “This implements matrix transposition with regard to ... as defined by ...”, so that next generations can align code with papers better.

And when you’re in a wacky environment like the PHP runtime or coding for a moving target like the browser, comments might be indispensable to explain one or the other really strange way of doing things, where you simply have no other choice. Look at the [jQuery source code](https://github.com/jquery/jquery/tree/master/src), where they comment excessively, which browser quirk they address with which work-around.