I realize the thread is about mastering but the time is going to come (and soon) whereby a plug-in will read all your raw tracks and using your supplied reference song create a mix that matches the reference by any metric you can imagine. I see it adding all the necessary effects to each track, pans, gains, etc., to achieve the goal. The computing power to achieve this likely resides in your mobile device. What’s left? More time to nail soulful heartfelt performances. Bring it on. grin

Bud