I should also mention Wayland, dconf and XDG_RUNTIME_DIR as that details some of the history. (Although at that time snaps could create /run/user/$(id -u) and use it.)
I should also mention Wayland, dconf and XDG_RUNTIME_DIR as that details some of the history. (Although at that time snaps could create /run/user/$(id -u) and use it.)