Doesn't support package version list (by itself)
Doesn't support package installed view (by itself)
'apt-get' is a great package management tool and it might be the only one that users are aware of. Despite this it seems to only permit users to do installs and updates but lacks providing insight in the current configuration, for which users must resort to different tools, such as 'apt-cache' and 'aptitude', 'dpkg-query' or 'dpkg' which they might not be comfortable with or not even be aware of. It should not be so hard to let 'apt-get' provide some hooks to the right tools or documentation reference to the right tools.