I considered all options which included the stack pack as you describe and I ended up with a tides mast track, retractable dyneema lazy jack system and traditional sail cover. (With no cutouts for the jacks; you have to retract them before putting the sail cover back on).. This systems works well for me. The jacks are 1/4” dyneema; My main is 300 sq ft. ( E33RH). I can drop the main pretty quickly and I end up tidying up the flaking when I am back up the dock. You then retract the lazy jacks and put on the sail cover. It’s a pretty uncomplicated system. If you have a stack pack, you still have to zip or strap it closed at the end of the day. You also have to worry about water/moisture getting trapped in it. Cosmetically, I think it looks cleaner without the stack pack on… My 2 cents.