You can replace parens with indentation, yes. There are lisps that do this, like WISP for guile,which provides "implicit parens through indentation". Then you

You can replace parens with indentation, yes. There are lisps that do this, like WISP for guile,which provides "implicit parens through indentation". Then you get the same amount of parens as fsharp. It is even standardised as an SRFI (although not widely.implemented)