I'm going to flip it around, what's the advantage of the track ends?
Forward facing dropouts allow an easier wheel removal.
Forward facing dropouts allow easier wheel adjustment while keeping brake alignment.
Forward facing dropouts allow better wheel retention, since some of the force goes into the angled part of the dropout (ie, into the frame, whereas a track dropout has absolutely nothing stopping the wheel from sliding forward except for the axle clamping force).
I've had many bikes with both, and my strong preference is for forward facers.