The silly move from /bin to /usr/bin broke lots of distros. Probably would have worked out if they'd had cp --reflink=auto --update to help ease migrations from files in /bin to /usr/bin and then just symlinked /bin to /usr/bin . However then any setups where /usr is a distinct filesystem from / would hard-require initramfs to set that up before handoff.

The python (is python2) transition was even more silly though. Breaking changes to the API and they wanted (and did!) force re-pointing the command to python3? That's still actively breaking stuff today in places that are forsaken enough to have to support python2 legacy systems.