I would have liked a USB A port as well. I read a report (forget the source, but it was in a major publication, not someone's tweet), that Apple thought about this, indicating the idea was given some serious consideration, though obviously they ultimately decided not to.There is a reason many believe the 2016-2019 MBPs are Apple's worst generation. Apple didn't reach that level of thinness through some sort of innovative or ingenious design. They literally just removed ports, produced a flat keyboard that is considered the worst they've ever made, and struggled with good thermal design. It's not a generation that will be remembered fondly.
"It doesn't fit"
"That's ok, remove it and make it thinner."
I'm glad the obsession with thinness is over. And hell yeah it's ok for a Pro device to be a little thicker if it means you can add more to it. MBPs are not ultra portables, that's what the MBA is for. The only thing I'm disappointed about is that there isn't enough ports.. I'd love ethernet and a usb a port.
I think a marketing advantage of including HDMI and SD (which would have also applied to USB A) is that, with the M1 Max, Apple is, for the first time, able to exceed the CPU performance of all high-end PC laptops, and meet or exceed the GPU performance of most of them. It thus has a chance of attracting Windows users, thus expanding their market. And Windows users are more comfortable having these ports.
An ethernet port would also be nice, but would have been more challenging because it requires more vertical space than any of the ports they have now, and I don't know if the new case sides are tall enough for it or not. I personally can live without ethernet, because that I genernally only use at home, so there's no need to remember to bring a dongle along for that.