[jrapdx3]

Of course you're right. I've written non-trivial programs in Scheme, Emacs is a good tool for it, but certainly don't know of an environment that matches the Lisp machines.

IDEs provide such environments for the most common languages but major IDEs offer meager functionality for Lisp/Scheme (and other "obscure" languages). With a concerted effort it's possible an IDE could be configured to do more for Lisp. Thing is the amount of effort required is quite large. Since AFAIK no one has taken up the challenge, we can only conclude it's not worth the time and energy to go there.

The workflow I've used for Scheme programming is pretty simple. I can keep as many Emacs windows ("frames") open as necessary with different views of one or several modules/libraries, a browser for documentation, terminals with REPL/compiler, etc. Sort of a deconstructed IDE. Likely it does take a bit more cognitive effort to work this way, but it gets the job done.