I am not sure but i guess this feature was implemented in C 8.5? Well in theory it might help the workflow but in the real world it gets more in the way than it helps. At least for me. Many times when i want to select several events across several tracks i often end up drawing an automation points on some automation track instead. I could hide those first but not all track can hide all automation tracks. Group Tracks allways have the automation for volume shown. The bad thing is that i can undo the drawing but not the resulting fader movement. Is there a preference to turn this off?