I place I used to work achieved something similar with lvm thin provisioning and split out something like /, /home, /var, /var/log and maybe a couple others. I

I place I used to work achieved something similar with lvm thin provisioning and split out something like /, /home, /var, /var/log and maybe a couple others. I think they also had something clever with lvm snapshots to rollback bad updates (snapshot system, upgrade, verify) so even if an update went rogue and deleted some important, unrelated files it could be undid