When debugging environment-specific issues, knowing the recent changes to a language can save you a lot of time. There have been many times (in my experience)

When debugging environment-specific issues, knowing the recent changes to a language can save you a lot of time. There have been many times (in my experience) where a project's production, staging, and localhost environments may be running slightly different versions of a language/interpreter. When something goes wrong somewhere, being able to recall the unique properties / idiosyncrasies of their environment can help you debug very quickly.