Lisp is certainly amenable to this, and structured editors for lisp have been around for a long time, but the concept is not specific to lisp except inasmuch as

Lisp is certainly amenable to this, and structured editors for lisp have been around for a long time, but the concept is not specific to lisp except inasmuch as it's much easier to implement since the syntax is so similar to the AST. For instance, I like to use Paredit [1] for elisp and Racket hacking, and there's a similar mode for Haskell in emacs [2]. [1] https://www.emacswiki.org/emacs/ParEdit https://www.emacswiki.org/emacs/ParEdit [2] https://github.com/chrisdone/structured-haskell-mode https://github.com/chrisdone/structured-haskell-mode