Caring about upgrade paths is super important to the longevity of a project. See: Python 3 vs Ruby 2 adoption. Taking the mentality that "I can break everythin

Caring about upgrade paths is super important to the longevity of a project. See: Python 3 vs Ruby 2 adoption. Taking the mentality that "I can break everything and just bump the major number" will lead to a project that either 1) is no longer is used by many people or 2) is a maintenance hell because people are staying on old versions and asking for bug fixes and improvements.