I must add, risking down votes in this thread, that it is fun to see Python people argue the practicality of Python 2 over the idealism/correctness of Python 3.
It is very similar to when Perl people argue that CPAN (better OO with Moose, better infrastructure for modules, etc) outweigh the emphasis on simple syntax in Python 2... :-)
It might amuse you to know that Perl 6, which isn't used either, has multi methods. :-)
Edit: Dynamic dispatch otoh is in most (all?) scripting languages.