Staingate?

I had a GPU issue (that was the subject of a recall that matched my symptoms precisely (and I could make the MBP core dump on demand in the Genius Bar) but "recall declined, does not fail diagnostics".

Damaged charging circuit on an MBA. Laptop worked perfectly. Battery health check fine. Just could not charge it. "That will be a $900 repair. Maybe we can look at getting you into a new Mac?" (for one brief moment I thought they were going to exchange mine... no, they wanted me to buy one. And of course, my MBA couldn't be traded in because it was damaged...).

I've also had multiple Magsafe connectors fray to the point of becoming like a paper lantern with all the bare wire visible, despite the cable being attached to a desk with cable connectors so there was near zero cable stress (and often only plugged/unplugged once a week).