It’s actually cheaper to use the USB 3 A ports then it is to use the USB C ports. There’s a lot less wiring (and circuitry) that needs to be done for this amount of ports. A full spec USB C port has somewhere between 20-24 pins that are all used if you need USB 3.x speeds. A USB 3 A port has 9 that are used for full data speed. It’s orders of magnitude less annoying to run that many traces on a board and keep the data speeds where they need to be.
It’s actually cheaper to use the USB 3 A ports then it is to use the USB C ports. There’s a lot less wiring (and circuitry) that needs to be done for this amount of ports. A full spec USB C port has somewhere between 20-24 pins that are all used if you need USB 3.x speeds. A USB 3 A port has 9 that are used for full data speed. It’s orders of magnitude less annoying to run that many traces on a board and keep the data speeds where they need to be.