Big picture, this is known as "the usr merge" which has been happening for probably a decade, each distro is approaching it at their own speed as they're not al

Big picture, this is known as "the usr merge" which has been happening for probably a decade, each distro is approaching it at their own speed as they're not all exactly identical in their FHS layout (some distros add a bit of this and that on top). You can read about it at a meta level over here, each distro has it's own wiki/working page if you Google around: https://www.freedesktop.org/wiki/Software/systemd/TheCaseForTheUsrMerge/ https://www.freedesktop.org/wiki/Software/systemd/TheCaseFor...