Why is it that if you run a system update or use dist-upgrade you're still left with things needing updating?
For example if you run a full system update and than open software updater it says "your system is up to date."
But if you open the software center and check for updates, there are still packages listed requiring update.
These sometimes include:
- shared gnome ubuntu stack
- gtk common theme
- snapd
- snap store
- core 18
Why are these not covered by the the system update?