FYI, they reverted python->python3 symlink. python command is now Python 2 again. https://discourse.brew.sh/t/python-and-pep-394/1813
Even though this revert, it is significant step: * many formulas dropped `depends_on "python"`. Python 2 was installed often by dependency before but it's rare for now. * Some formulas (including vim) keep `depends_on "python". It means they are depending on Python 3 instead of 2. It makes vim plugin authors can consider about dropping Python 2 support. (vim is linked with Python 3 on recent Ubuntu already) I hope Apple will provide "/usr/bin/python2" at least in next macOS, to allow people using "python2" shebang for scripts support only Python 2. (And I hope Python 3.6 (or 3.7) is pre-installed in next macOS)... -- https://mail.python.org/mailman/listinfo/python-list
