I get a lot of notifications. At the moment, I've got 65 unread 'inbox' items and 4 unread 'bell' items. The little flyout can't handle that volume, so I've given up on it, and I go to [[Special:Notifications]] a lot – multiple times per day. And every single time I load that page, the first thing I have to do is to click over to the 'Unread' tab and wait for it to filter the results – multiple times per day.
I want that page to default to the 'Unread' tab. I don't care whether it's done automatically for everyone or if it remembers the setting that I used the last time or if I have to manually tick a box in Special:Preferences. I just don't want to have to click that on tab – multiple times per day, every day, for the rest of my wiki-life.
The problem is obvious at my volume, but the automatic focus on unread messages would probably be helpful to anyone with more than one or two unread notifications.