Yes, there are probably people for whom this sort of thing can work.

For example, when I was at M$, management came to us extolling the virtues of Cortana and the then new "smart inbox". The manager was ecstatic. And for him, it maybe really was the neatest thing since sliced bread. And I know plenty of people with 10000+ unread in their INBOX. For them, it might be lifesaver.

But all the engineers in the room were "eek, get it away from me and make sure it never gets near my inbox". I personally maintain an INBOX-0 policy, not always perfectly, but it works for me. Unreads never last for more than a few minutes. So I have "situational awareness" of my e-mail, and when Apple also introduced smart inboxes, they broke that situational awareness while adding nothing whatsoever to my benefit. And people I communicate with also started losing e-mails, because they got sorted somewhere they weren't expecting.

So turn that shit off.