One example that comes to mind of where those fall apart is when I was trying out Racket, I was able to copy and paste sample Web code into DrRacket, and have a web server running in seconds, you (for understandably reasonable reasons) cannot do this in tools like repl.it but you can in these local editors.
Additionally, if you had these bundled editors, and offline copy of your docs for that language release, you could essentially have everything someone needs to learn a language in one shot, even if the internet is unavailable momentarily.
I haven't seriously used Repl.it, but how close does it come to providing something like this experience for those languages?