[BeetleB]

The standard Python interpreter is crap. One should use IPython. I'd like to see a comparison with that one.

[dangerbird2]

The standard repl for Steel Bank Common Lisp is worse than Cpython's with no basic readline support. The Common Lisp environment really shows its strengths when using a fully interactive development environment like a Lisp machine environment or Emacs with SLIME.

[omaranto]

I'd call it the "built-in repl" rather than the standard one, since I don't think it's actually standard for people to use it directly.

[lispm]

CLISP has readline support.