This REPL like Nodejs REPL are great efforts, if limited to a teletypewriter emulator. They're pretty terrible compared to what was available in Lisp machines

This REPL like Nodejs REPL are great efforts, if limited to a teletypewriter emulator. They're pretty terrible compared to what was available in Lisp machines and Smalltalk (for example) from decades ago and what now live on in McCLIM's Lisp Listener https://common-lisp.net/project/mcclim/excite.html https://common-lisp.net/project/mcclim/excite.html and Pharo Smalltalk Playgrounds. The main problem is the Print part results in "dead text". For example, you can't re-select it (other than using history shortcuts), you can't interact with it (it's dead, afterall) and there was only one representation of it (some kind of "to-string" for it). You can't even inspect it. Beyond that, you're stuck with the teletypewriter environment. You can't display an image, or sound wave, statistical model graphically etc, let along interact with them.