在 Rails 6.0 开发期间，GitHub 工程师递交了 100 多个 pull requests 去改进文档、修复 bug、增加功能和改善性能。 GitHub 称升级 Rails 6.0 到生产环境没有对客户造成任何负面影响，唯一的异常发生在测试期间，还是 bot 导致的
GitHub is about a third of the way through an architectural change that began last year. The company is moving away from Ruby on Rails toward a more heterogeneous, composable infrastructure. Ruby still has a place at GitHub – Lambert referred to the company as a Ruby shop, but he said there's more Go, Java and even some Haskell being deployed for services. The goal, he explained, is to make GitHub's internal capabilities accessible to integrators and partners.