TLDR: Sounds like this makes it harder to mess up the locale setup so I'm all for it. This mail just reminded me that one of my own projects didn't handle a messed locale setup gracefully in the past causing multiple users (that apparently had a messed setup) to report issues, e.g. https://aur.archlinux.org/packages/ syncthingtray#comment-816671 and https://github.com/Martchus/syncthingtray/ issues/109. And when I searched for the error to investigate the issue I found many results. If it helps preventing applications from crashing completely with errors like "locale::facet::_S_create_c_locale name not valid" it is likely worth including.
