Mh. Honestly, I've encountered ruby in about 3 primary ways. RoR and Sinatra, which are kinda the same webdev thing, and Chef as a config management. There are additional things, but more supporting things - Rake and Capistrano as deployment systems, Berkshelf and such as supporting things.

Outside of this, it's been perl and python, with python replacing perl after that whole perl 6 fiasco while the language and distros started understanding packaging python.