This is how they expand the market for screw drivers. Everyone has several Phillips and slotted screw drivers so they need to invent new shapes. Expands the market for tooling to make the screws, as well.
Some shapes like torx and square are far more secure in the drivers, no chance of slipping. Like hex/allen but quicker to use since the bits are tapered.
Some aren't so new - I understand the torx was developed in the '60s. Some might be better for auto-loading drivers. I'm glad the torx is apparently now universal for deck screws rather than the square/philips combo that used to be everywhere.
But the variety can be a royal pain. In putting up a new deck I had to remove an 8" post fastener that a subcontractor installed. It looked like the T35 socket on my similar fasteners but was actually a spline bit, difficult to find except one came in each box of that type of fastener.