Ever since ubuntu provides 'upgrade' installation path (since 10.04 if I'm not mistaken), I took it and hoping that my installed packaged will be kept intact or automatically upgraded. But apparently that's not what was happen.
All my installed apps are wiped out and I have to install everything from beginning. Easy for ubuntu or partner provided packages but quite a pain for 3rd party packages.
Was I missing a step during the installation procedure? Or is there another way to keep my installed packages across dist upgrades?