Create a dynamic click track on the fly...
I sometimes have clients who send me a scratch track with no click, and many times with some real screwy breaks.
I could make the click with the other DAWS, but with Sonar, I just create transients using Audio Snap, print those to MIDI, open Step Sequencer and pipe in a sidestick/cowbell/woodblock/etc. and I have a ready-made click that conforms perfectly to the less-than-perfect scratch track in no time.
Also had more latency issues with Cubase in sidechaining, external inserts and sending FX to a singers headphones without printing.
Not saying Cubase is a bad DAW (or any of them for that matter) but for my work flow, Sonar has just allowed me to do what I want more gooder than the others