Why are we installing Ruby 1.9.2/1.9.3 gems into a 1.9.1 folder?

Question

This comes about because the Gem installation directory used by the gem command, seen when using gem env, is set to something like:

Answer 1

I think it's because these versions should be compatible, and if you had separate directories, you'd have to reinstall all your gems with it. This way you can upgrade the version of ruby without having to reinstall all the gems.