This PR makes it possible to use the Unseen view as a default home page:
Keep in mind that the Unseen option will be available only if this view is enabled in site settings, here:
Speaking of dismissing on the Unseen view, I agree with Sam that this is hard.
The best way of thinking about this tab is like about tweaked version of the Latest tab, as Joshua explained:
We don’t show post count and the Dismiss button on the Latest tab because we don’t mean that users should read through all topics on that tab, the same applies to the Unseen tab.