The comment you're replying to gave a good example - the history of Java.
If you're shipping code and modified code, you care about the language in which you can make those modifications. A frozen language means that either those modifications are harder (because potential improvements to the language are ignored) or they require writing components in an entirely new language and figuring out interop.
(If you're not shipping modified code, then you don't care if the language changes after you ship, anyway. You shipped, and then you're done.)
If you're shipping code and modified code, you care about the language in which you can make those modifications. A frozen language means that either those modifications are harder (because potential improvements to the language are ignored) or they require writing components in an entirely new language and figuring out interop.
(If you're not shipping modified code, then you don't care if the language changes after you ship, anyway. You shipped, and then you're done.)