Stable release updates aren’t always super easy to test for reporters and sometimes users are requested to enable the whole -proposed
repositories to test a single package, leaving them in a dangerous situation, as they may update other stuff that they are not meant to test.
So, in my opinion we should ship by default a /etc/apt/preferences.d/proposed-updates
allowing selective update.
Such packages could be easily tested now with something like apt install foo/release-proposed
without having the user to toggle check-boxes that may lead to higher system instability.
A part from the terminal usage (that imho isn’t a big deal and can be fixed by a tuned update-manager), one other drawback is that when a package to be tested is composed of multiple inter-dependent packages, where the command would be something like apt install foo/release-proposed libfoo-1/release-proposed ...
.
So maybe we could provide a command line tool (ubuntu-proposed-install
?) that can handle this easier, so that will only upgrade from proposed the packages from the same source that have been previously installed.