It sounds like the discussion has already started for snapd:RFE: common interface to expose host's os-release to container-like runtimes
"For snaps the non auto-connected interface system-observe already lets a snap access the host os-release under /var/lib/snapd/hostfs/etc/os-release or /var/lib/snapd/hostfs/usr/lib/os-release in the snap mount namespace.
If there is some consensus with container runtimes that this information should be exposed over environment variables a new interface could be added that enables that as well."
Does adding another mapping to have a standard across the industry make sense now since systemd is already doing it?
/etc/os-release -> /run/host/etc/os-release if it exists
/usr/lib/os-release -> /run/host/usr/lib/os-release