[iolsantr]

I think paredit is one of the best arguments for simple sexp style syntax. It allows you to build easily comprehensible tools that manipulate code on syntactic rather than textual level. Its definitely possible to build the same kind of tools for more complex syntaxes, but its harder for users to understand and use those tools.

[sdevlin]

You'd also have to rebuild the tools for every new syntax, whereas paredit basically "just works" for every lisp.