Comment 12 for bug 1378245

> How much effort would it be to actually build pristine images per silo that contain the packages in the silo?

That is actually a planned feature, but don't hold your breath. The roadmap for getting there is quite long.

> Simple case: as the root is made writable we would not catch the situation where a component is actually depending on write access which would not be possible under ro root.

The most recent release of the tool switches the root back to readonly after installing packages, so it's not that far off from released images.