"Dealers were installing the wrong floor mats, and these were trapping the accelerator pedal. This problem was well-documented as the cause of "unintended acceleration" incidents, including at least five deaths."

This sounds like an illusory problem to me, not because I doubt the facts, but because it's all about framing. I got floor mats for an old car, with anchors to hook to the seat rails, and I couldn't figure out how to fasten them. So I took them to a dealer and asked them to do it. After a while, they came loose and the mat shifted several inches in the direction of the gas pedal. Now, it didn't especially matter, and I didn't crash, and eventually I repositioned it. But this is really about multiplying large numbers by small probabilities. There are probably only a couple hundred cars like mine on the road. If there were millions, perhaps it would be a major problem. But why should we all worry about Toyotas just because the floormat issues are mentally grouped together?

Non-floormat issues are different, but I think I would have to experience it to believe it when it comes to the brakes not being able to override the engine on a typical Toyota.