Its not always the developer. For instance, I do some utility class software that needs to just work on RedHat/CentOS 6. Having to build Python 3 from source,

Its not always the developer. For instance, I do some utility class software that needs to just work on RedHat/CentOS 6. Having to build Python 3 from source, or use SCL and mess with paths, and virtualenvs is simply not an option for my target user.