Yes, I want to highlight what you say about large companies. ruby really shines, I think, if you are a solo dev or a small team, where everybody is on the same page and the codebase is completely understood. It is also good for libraries with a clear focus. For larger projects, it might work too, but you would need some good culture of "keep it simple" around it. A few ego-trips of supposedly smart devs and things can get hard to understand and hard to work with fast.