I prefer to install as few 3rd party packages as possible. In RHEL7 until recently Python 3 was only available via 3rd party repos, until EPEL added it. So no

I prefer to install as few 3rd party packages as possible. In RHEL7 until recently Python 3 was only available via 3rd party repos, until EPEL added it. So now it's not that big of a deal to install python3, but before that why would I go about adding ius or something to get a modern python when there's a perfectly fine Python 2.7 built into the system for running sysadmin jobs?