I'm running a Logic set up on my 2012 MBP, and I've never felt limited by its capabilities. I've been running Macs for music production for almost 20 years, and in my experience they have all at some point not had quite enough in the bag to let me do what I wanted of them. This is the first one (now fours years old) that has stayed ahead of my needs. I can run multiple copies of Massive, and rows of Waves plugins no problem.
I have hit limits with real-time 3D stuff, like gaming and Houdini, but music production is still well within its capabilities for me.