story
If you can live with that, then by all means stick to 2.7 until your Red Hat support contract expires. If not, consider switching to 3.x.
No new features, no improvements, nothing -- just the same language, for a decade.
This is not ADD, this is not rudderless. This is preferring actively maintained and improved things over old crap that never gets fixed
Or a good, supported, still used and very stable language: Fortran.
Potentially no new libraries (for new things and/or API connections)
Not sure how long new versions of existing libraries will keep 2.7 support.
If you prefer to have no Google App Engine, Azure, Amazon or distro support other than Arch, then have at it. I'll keep that and PyPy, Pyston, Jython, IronPython, PyInstaller, not to mention all programs where Python is integrated like GIMP, all of this is Python2 only.
Enjoy your Python3. I'll stick with Python.