[duderific]

> Your whole team could be having a new discussion within a thread and you'd never know unless you participated in the thread previously or somebody @'s you.

That's kind of the point? You shouldn't be bothered unless you want to be. To me, a thread isn't necessarily supposed to be geared toward discoverability. You'll see the main topic hit the channel, and then you can choose to follow the thread if you like.