> Trollius:
>
> https://pypi.python.org/pypi/trollius
You should point to: https://trollius.readthedocs.org/ which states that it is discontinued and you should just move on to Python 3.
I think you should give asyncio a try first (especially on Python 3.5 with async/await keywords) before stating there's no compelling reasons. Another strong (for me) reason to go with Python 3 is that it has bunch of old warts removed. The code is just easier to maintain.
https://pypi.python.org/pypi/trollius
Or, better, gevent:
http://www.gevent.org
No compelling reason. That is why 8 years later 2.7 is still used by the majority.