The glibc 2.35-6 package ships with the C.UTF-8 locale included.
This means there is now a UTF-8 locale available by default and en_US.UTF-8, which requires editing /etc/locale.gen and running locale-gen, is not needed anymore.
Currently consists of 3 geographically diverse boxes which are managed
by DevOps. (See commit 9f65f99c6b2330e7e2fbceb988115c5cc65db09f in the
archlinux/infrastructure project.)