The ability to warn other riders is really beneficial.I use a Cardo Packtalk Bold and almost never connect with other riders. I just use it for music and the very rare phone call.
But I should use it more for group rides I'm leading, because it would really help when missing a spot and wanting to do a u-turn, or warning riders behind of some hazard etc.
The sound quality on the Cardo and upgraded speakers is what makes it the best choice for me.
Especially when passing other vehicles that may be obstructing what's up ahead.