In my experience the major difference is that rbenv feels more of a convenience in upgrading ruby on truly outdated systems (or when you can't use prepackaged f

In my experience the major difference is that rbenv feels more of a convenience in upgrading ruby on truly outdated systems (or when you can't use prepackaged for reasons), and that for majority work minor version differences are at most one line in Gemspec away. I really, really can't say that about Python.