What if the distro-packaged Ruby contains a bug, and the distro does not provide an update? What if the distro only provides 1.9 but you need 2.0 features? It

What if the distro-packaged Ruby contains a bug, and the distro does not provide an update? What if the distro only provides 1.9 but you need 2.0 features? It sure is easy to wave your hands and accuse people of being insane.