That is something I have wondered for quite some time

Seriously guys, the dude one upped the nail. Pretty fucking impressive if you ask me. I would imagine at the time he was more focused on the fastening system than the driver. Pretty amazing innovation when you think about the mechanisms applied and sheer volume of applications. I'm more dissapointed by the fact that it took over 120 years for someone to come up with a "better" head as apposed to the straight slot (square came before Phillips). Typical accepting humans.

Just talking shit, buddy! But I do wonder why new things (mostly electrical) still come with flat head screws.

Could it be that they are harder to strip?

I wrote this when I interpreted that you're complaining about slotted screws (Flat head screws allow for a flush look and feel once the screw is inserted.)...

I prefer them for low torque tasks, where there is little to no risk of stripping. Mostly because in a pinch, a screwdriver isn't needed.

Apple used that fact on the old wireless keyboards, when they made the battery cover slot big enough for a coin.

The clamp that holds the rear light on my bike uses a flat head because it is a plastic part that would strip out with anything else.
The screws in covers can be removed with the pliers or sidecutters if you really need to.

Oh, and for everything else... square or torx (or allen on a bicycle). Phillips sucks as bad as slotted.

It's just so artists don't have to draw Phillips screws!