Switching to --user by default is being actively discussed upstream: https://github.com/pypa/pip/issues/1668
In the meantime, I plan on updating the manpage to describe --user and any other missing options. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org