Every one of these boards had at least one USB 2.0 header. With that header if you need multiple USB 2.0 devices multiple compannies offer an internal USB 2.0 hub. I bought an NZXT mostly due to its finished look and its magnetic. Everything I had before and more is now plugged in there including my logitiech unifying receiver, power supply, Aquaero (ASUS lost their chance with me on the last generation with defunct software for fan and pump control) and anything else that require nothing but a SLOW communications loop. The Z170 M8E assy didnt have enough ports for all my slow commmunications devices either so I had the hub in that case as well and honestly it makes for cleaner cable management too as I have only one USB 2.0 cable in the front of my machine for a run just long enoungh to get to the header on a M9F which is about 2 inches. The front panel audio that Im actually going to pull has the longest run on the front side of the case. Im never going to use that again after buying an external 24 bit 192KHz DAC that nothing on board can touch and uses the optical Toslink out.
As for card readers, you are kidding right?
I haven't used USB 2.0 for data transfer of any kind since USB 3.0 was released and I'm actually disappointed that more USB 3.1 devices haven't come to market yet and that some of the devices you mentioned haven't bothered to upgrade their interface and wont bother until they have to. Stepping up with new costs time in R&D and money to implement in the manufacturing process. Time for them to stop walking backwards and take a step forward.
My opinion is actually the other way around. ASUS has stepped up and stepped forward. Before the "In Search of Incredible" it was "Leading Innovations" Its time to put USB 2.0 to bed. Its old technology, 15 years to be exact which in the world of technology is ancient. USB 3.0 went mainstream 7 years ago.
There is actually a very hilarious side to your post. I read very much the same thing about USB 1.0 when USB 2.0 went mainstream 17 years ago. How many Boards are you seeing with USB 1.0 headers these days?
If you prefer Asrock boards as far as I know there are no laws preventing you from buying them. If you compare features though their boards that are priced right in line with ASUS Z270s give or take 5% are lacking features that ASUS has. Check the specs on their super carrier at a $380 price point and compare that to the Forumla at $9 more and see just how much more you get for the $9. Its a very long list with the exception of 1 less USB 2.0 header. The Asrock board you listed is not in the same ballpark as the Maximus boards. Compare that to the likes of the ASUS PRIME Z270 series which are on target with the exact same pricing and actually the closest one in specs, Z270-P is cheaper. All of the Prime boards have the same 2x 2.0 headers as the Asrock economy version.