[fnordpiglet]

PC motherboards are often like a study in the history of PC motherboards with vestigial functionality that hasn’t been in widespread use in decades. That’s a fairly poor indicator, and I think it largely happens to buffer the feature sheet, take advantage of cheap pricing on components over time, and copy and paste functionality in their design software. It’s over. The only place for a USB-A is on an aftermarket USB hub. That’s ok. It was nice while it lasted, but it’s time to move on.

[layer8]

There is no incentive for manufacturers to use USB-C over USB-A for applications that neither use charging nor need above-USB-2.0 speeds. A lot of peripherals and gadgets fall into that category. Another factor is the limitation on available PCIe lanes depending on chipset. If you can provide 8-10 USB ports, you won’t be able to give all of them USB 3 speeds, and having USB-C ports with different speeds on the same device would be weird, as there is no color-coding mechanism like with USB-A.