Old Standard Assets open source?

Since original Standard Assets are now unsupported and are officialy stuck on unity 2018 is it possible for Unity to release them as open source as they are a valuable boilerplate scenes and scripts for anyone to start build their own games. (Not to mention the art)
If anybody would pick up and modify them to work without errors on unity 2020 and 2021 with new render pipeline and put it on github would it be ok ? Or is that out of question because of legal issues?