I can think of a few situations where a "no-stress" TN 0 roll might be called for, mostly things like Knowledge checks, though it could work for anything where the PCs definitely succeed a bit, but there's a question of how much.
An example of a scene I'd like to have in a game: The PCs attend a Kabuki play (and of course the players are handed a short script of one scene, to play it out rather than have me just read to them). The subject is the madness, cruelty, and finally the murder of Emperor Hantei XVI, the Steel Chrysanthemum. I would inform the players that this play probably makes them very uncomfortable, not because of the violence, but because it portrays the Son of Heaven in a negative light. How could such a play even be legal?
That's when we call for a TN 0 check, probably Earth Ring, using either Culture or Government, maaaaybe Composition. All the characters can assist, using any of those skills, and each success is one question they can ask me regarding what they know about the subject. "Who was this guy?" Give them the basic history. "How was such a play written?" His successor gave specific permission, and even commissioned a handful of plays and songs about it. "Why would he allow that?" Because his claim to the throne was somewhat tenuous, and he wanted to quash the idea that he had XVI killed in a coup. And so on. You could ignore Strife, or you could let them suffer it, to reflect their discomfort at the subject matter.
Of course you wouldn't want to do this for every bit of lore. I thought of this because I like the idea of revisiting the War of Spirits, where Hantei XVI returns from the dead (though I would have a different setup), and I would like to give the players a scene that they might remember a little better than a one-page write-up.