I've given up using anything remotely like a Phillips or a Pozidrive. Seems to me, especially with the latter, that there is a distinct lack of adherence to the spec. between screw makers and driver bits. The number of times, the bit cams out....so it's Torx for me every time now.
I think I must have screwdriver bits to cover most of those in the wikipedia article since I bought a box of several dozen including security screw heads several years ago.I think I have used five of them and two were torx.I find it curious that every plain slot head bit in these kits is very thick in relation to it's width but I suppose that comes from making them from 1/4 inch hex.
It has been a minor annoyance for years when people ask me if I can lend them a Phillips screwdriver because they have a screw with a "star" shaped recess.It isn't so much that I dislike lending tools to people-although I don't appreciate it if they take ages to come back-its rather that true Phillips screws are fairly rare in the UK since woodscrews tend to be Pozidriv and the head geometry is different.What I hadn't realised is that JIS heads look similar and have very different geometry and this image shows just how different.