Yeah. Consider that BigCos end up writing transpilers and new runtimes for their target platforms before rewriting the application, which would entail discardin

Yeah. Consider that BigCos end up writing transpilers and new runtimes for their target platforms before rewriting the application, which would entail discarding the decades of built-in bugfixes and application logic as well as reconstructing the organization around a different platform -- HipHop for PHP, Grumpy, etc. A language change is no small thing in any company of appreciable size.