What API-breaking changes? Moving a library from stdlib to a gem doesn't change the API of the library. About the only difference is having to invoke rubygems

What API-breaking changes? Moving a library from stdlib to a gem doesn't change the API of the library. About the only difference is having to invoke rubygems before the require. However, changing what people can expect by default in a standard Ruby installation is more of a paradigm change (albeit not terribly grand).