I thought it was in effect fetching remote code, from git or wherever, and then executing it (or loading it) in the local environment.
I'm just curious to understand the situation better, but which part architecturally strictly needs the JVM? Even with babashka, or on this website, I don't think anything stops me from Frankensteining in an external library in a running REPL. I could technically fetch the content of a library's repo and then copy each file and run its contents (with the ns blocks) in the REPL. Then the library would become locally available (assuming it's a very plain Clojure library that is)
I assume `add-libs` is sort of a convenience wrapper for the same idea
For JS, it's a bit more complicated for the Clojure side, because the compiler isn't in the runtime, SCI is interpreting the Clojure code, it is not compiling it to JS and loading it, which makes adding a source pure Clojure lib tricky. But it could possibly be done for compiled Clojure libs and JS libs, that said I think you couldn't use any forms of advance compilation, because that messes up the references. So there's a lot of caveat I think to doing it in JS and that's why it's not done.
