If they're adding features purely for the convenience of python shell users, how about, I don't know, remove the need for significant whitespace (by adding "end block" statement). Because Python shell is a major pain to use when you try to copy-paste some code into it and it doesn't like the indentation levels. On the other hand I can copy-paste whatever into my Lisp REPL and it will run just fine. Or allow several statements per lambda. Saving a few keystrokes writing ".format" doesn't even register on the same scale of annoyance.