Autolite quality is very hit-or-miss at times. I've got a good friend that owns a shop and won't install anything else that never seems to have problems with them. On the other hand, I sold Autolite for years, and the only thing that had a higher defect rate in spark plugs was those piece-of-chit E3s. The set of Autolite 25s I put in my '75 Thunderbird was among the problem plugs. I was driving down the interstate, hear a pop, then what sounded like an exhaust leak along with a vibration and huge loss of power. I pulled over and discovered that one of the plugs had blown out (just the porcelain and center electrode). Waited 20 minutes on someone to bring me another plug, changed it, and the next week another plug from the same set did the same thing. After the third plug did it, I swapped them all for Motorcraft, and only installed Autolites myself one other time (they were what was available for my sister's Suzuki).
I've never had a Motorcraft, NGK, Denso, Champion (no joke, I know everyone hates on them), or Bosch single-electrode plug returned (Bosch +2 and +4 are a totally different story). I've had one set of ACDelcos returned (and I shouldn't have taken them back, the dumbass refused to believe that not gapping them is what caused his issue), and a few dozen sets of Autolite and
E3 over the years, and nearly all of them were from a plug blowing-out like that.
That said, when I've sold aftermarket parts, I've sold more Autolites than any other brand based on the price/value, though I've always recommended NGK, Motorcraft, Denso, or ACDelco if the customer could afford it. (I run NGK V-powers in my Mustang, and I've also run Accel and Bosch SuperPlus in it, they're the three that clear my headers).