Back when I wrote a lot of Python, something I disliked was how one could easily reload a module, but existing instances of classes wouldn't get updated. You c

Back when I wrote a lot of Python, something I disliked was how one could easily reload a module, but existing instances of classes wouldn't get updated. You could implement the machinery to do so for your own stuff, but of course that could be arbitrarily flaky. Performance was definitely an issue, but for the sort of programming we were doing it normally wasn't a big issue. Duck typing could definitely be an issue — one had little confidence that code would run as desired. Overall, I really liked Python, but these days I'd sooner use Go or Lisp.