I am working with this guy who is a phenomenal pianist but sometimes needs to overdub a few rough passages, to patch them up, you know. He would start playing at random whenever he feels he knows where he is.
With Sonar I need to watch for his (very subtle) cues and I missed a couple of crucial notes a couple times.
Now if I had the punch guard system in place, I could have just relaxed and once he starts playing I hit record with the certainty that the few seconds before that have been captured anyway. This is just one of the examples I can bring to the table to reinforce my proposal for the feature!