Rounds are an abstract unit of time. Removing all abstract units of time, also removes rounds.
Rounds are not an abstract unit of time. Rounds are 10 seconds (or insert your edition's equivalent). That's not abstract. That's a pretty specific unit of time.
Yes.
Strange.
I've never been in a game where someone used rounds for roleplaying outside of combat or other conflict resolution mechanics, except in special circumstances, like maybe Skill Challenges.
So, you're like, "Ok, let's begin the game. You're all standing around the inn. Roll for initiative. Bob, you won. What are you doing? Drinking beer? Awesome. Sam, you're next. What are you doing? Talking to the wench? Yeah, she seems interested, but she might need a few drinks to liven her up. Sarah, you're next. Oh, you're talking to the wizened old man who seems like he wants to give you a quest? Awesome. He tells you the details and says he'll pay you 50gp. Hold on. Bob, your turn is up again. What do you want to do? Oh, well you spent a minor action drinking beer last round. You can move or talk this round."
Yeah?