Easy access to external repositories.

[Artur Szostak]

> Well, looking at Linux for inspiration doesn't mean we have to do everything like them ...
> Linux (at least APT) allows versioned dependencies, and user selection of the version to
> be installed for packages that are provided with different versions (even through a
> standard GUI like Synaptic).

Sure. I was just thinking that since this hasn't been done before, it is going to have a higher risk and likely take longer to "bring to market". So the SAT solver approach would be nice, but probably not feasible within the next year, or two, or however long it would take to bring to production grade.