Inbox by Gmail: the Facebook of email.
I don't want to have to bother creating rules for every Kickstarter I back, mailing list I join, marketing email that's just useful enough not have me unsubscribe.
The Priority Inbox does a 99% perfect job of sorting the emails I actually care about. Occasionally (once every other month), it misses something, but a quick scan of the "everything else" box usually, which I do anyhow, has me catch that.
That's the kind of algorithmic sorting that I want more of.
This one at least is solved for me now, since most list software implemented RFC 2919 a few years ago. Lists should include a list-id header, so just write one rule "if mail is to a list named foobar, file it in lists/foobar". Or if you don't care to separate them out, even just "if mail is to a list, file it in lists".
What the hell, what kind of inbox-policing is that? How about "I don't understand why people would ever want to use a Mac, IMO the window management buttons should always be on the right side"?
People have different tastes, different workflows and different use cases. Is that really so hard to understand that you need to call this "the facebook of email"?
What, really, is the difference? I see many of Gmail's changes as the automatic equivalent to rules/labels and they have a massive sample set to base it all on.