> I agree we shouldn't be aliasing C.UTF-8 to en_US.UTF-8 though

What can we do about reverting that change?  Python's current behavior causes unexpected exceptions, especially in containers.

I'm currently debugging test failures in a Python application that occur in Fedora rawhide containers.  Those containers don't have any locales installed.  The test software saves its current locale, changes the locale in order to run a test, and then restores the original.  Because Python is incorrectly reporting the original locale as "en_US", restoring the original fails.