This has always been true. New syntax or libraries were added in almost every major Python version. If python2 was python2.2, it wouldn't support `with`. It's

This has always been true. New syntax or libraries were added in almost every major Python version. If python2 was python2.2, it wouldn't support `with`. It's just that python2 has been Python 2.7 for a decade, so it's been relatively stable.