Interesting topic here and one that hit's home with me recently. We had the wife's 2009 Pontiac G8GT at the dealership finally to have a couple recalls addressed. One of them was for the "accidental shutting off the car" while driving, due to a person's knee potentially bumping the ignition key and turning it to the off position. Obviously a design flaw on GM (or Holden) when the car was built. Anyways the only thing that was done was we got a new ignition switch AND a new "fixed key" to fit the ignition switch. No more "foldable, switchblade" style key. Dealer took it and replaced it with a fixed one
In summarizing this fix, all that was really done was the key/ignition switch was rotated 90' so that if your knee bumped it, it would hit the flat side of the key/fob and NOT rotate it, thuis keeping the car running.
So the few of them that are still out there in vehicles I'd consider lucky and keep them at all costs. Since this is the wife's car I rarely have to deal with the larger bulky key BUT that foldable key was nice.