Gut feeling: this is the old the-python-release-was-tampered-with-problem. But is it too much to ask for a release upgrade script to check
`/usr/bin/python3 --version`
and to check if `apt_pkg` is actually installed
instead of just running blindly into the upgrade, ripping out thousands of packages, and then saying "yeah, it'll be fine".
🤦♀️