*** Automatically check for updates:
That's enabled in all packages, and all of them are looking for updates of their root feature(s) once every week.
*** Package structure:
All Mars packages (with the exception of the RCP/RAP package) are using a single root feature that is checked for a higher version. This root feature is an EPP feature and controlled by the package maintainers. In theory it could be updated and the respective
package would be updated with the new content. Of course, this works only if the update content is available from one of the p2 repositories built into the packages (which is the Simultaneous Release p2 repository).
The RCP/RAP package structure has changed with Mars, as an experiment in order to get some experience and as a way to "convince" others in the Neon timeframe to change the package structure of the remaining packages. In this package *all* content features are
installed as root features and therefore checked for updates.
Personally I think that's the way to go for all packages. The fact that it is enabled in RCP/RAP gives us a chance to get some experience in order to roll it out for all packages in the Neon timeframe.
Regards,
Markus