&gt; I hold up Bundler as one of the great success stories of open source<p>It&#x27;s a great success in many ways, but the problem it solves is completely self-inflicted by rubygems. I&#x27;ve also been doing Ruby for over a decade, but I&#x27;ve also learned a lot from other library ecosystems, and I feel pretty confident saying that disallowing version ranges makes all those headaches completely evaporate.