As I've started working on cars made during this century, I've started noticing that bits other than standard philips and flat head are being used. For instance, I needed an 8mm hex bit ( allen wrench style ) to open the calipers on a 2007 Mazda 3, and on a 2002 Nissan Almera I just bought I can't remove the steering wheel without a T50 size Tamper Proof Torx bit.
I see that in fact there are a wide variety of these odd ball so called "Security" bits:
Which of these bits and in what sizes am I likely to run into working on modern cars? As bonus, what's the point of these "security" bits if any putz can buy them on Amazon?