It's less about where Python 2.7 is going and more about where the libraries themselves are going. If you use a library which is considered deprecated by a large part of the python community, don't be surprised not to aspire new contributors.
No one expects 2.7 to go away, that doesn't mean contributors want to deal with Python 2 when 3 is available elsewhere.
No one expects 2.7 to go away, that doesn't mean contributors want to deal with Python 2 when 3 is available elsewhere.