because Python 2 never dies! (in fact it is dead and unsupported many years)...
https://www.python.org/dev/peps/pep-0404/
Official pronouncement
Rule number six: there is no official Python 2.8 release. There never will be an official Python 2.8 release. It is an ex-release. Python 2.7 is the end of the Python 2 line of development.
Upgrade path
The official upgrade path from Python 2.7 is to Python 3.