For sake of comparison I also have a retina 2012 MPB, and it’s been rock solid. Aside from one OS reinstall for AFS I’ve never had any issues.
Glad to hear that there are people not plagued with the issues I've had. Perhaps I've been very unlucky but even though I've loved using the laptop, the amount of hardware issues I've had made me want to go back to my thinkpads before.
Not saying thinkpads are perfect, but at least they mostly favor quality over design.
In all my years of using laptops (15 years before I got the apple) I've never had a failing power cable, until I tried Apple cables.