On: Uv's killer feature is making ad-hoc environments easy

[regularfry]

The mainline ruby doesn't but tools to support virtualenvs are around. They're pretty trivial to write: https://github.com/regularfry/gemsh/blob/master/bin/gemsh

As long as you're in the ruby-install/chruby ecosystem and managed to avoid the RVM mess then the tooling is so simple that it doesn't really get any attention. I've worked exclusively with virtualenvs in ruby for years.