[kablamo]

You rock.

You have high fidelity repls for python and ruby. The Perl hi fi repl is called Reply (https://metacpan.org/pod/Reply). If you are interested check out the plugins -- especially for Term::ReadLine::Gnu. If you have questions, let me know.

Most languages probably don't have the ability to download dependencies from the internet on the fly. That might be a nice feature to have.