But in my line of work I have to use Sibelius for notation.
And I know I would definitely miss the audio editing features in Audition, as I mostly work with audio rather than MIDI.
Then again Sonar doesn't have sound modules to rival Reason's NN-XT et al. Or a drum machine like ReDrum....
OK, so I'm really glad that I don't need to limit myself to just one host. Using a variety of specialist tools is pretty cool, and can be a lot of fun in terms of creativity.
But I'm glad for those of you who can. I can see that it would simplify life!