Yes. The practical problem is out of date packages and subtle incompatibilities between "system" installs of Python and the private one.
I now use the "Julia" Python as my 2.7 version and a system Python from PSF for 3.5. Conda is limited to Python 3.4 and matplotlib 1.4.3. Conda et al will always lag a bit with the risk of more incompatibilities creeping in.
