Makes sense, the iphone has only one port after all. Interesting that it supported a second one though, or maybe that's the Pro revision designed for this use case?

The second port is likely necessary for USB hubs that rely on both ports. I had one for my M1 Air. I assume it'd still work with the 2 different speeds, but I'd be curious to try it.

I'm going to get a Neo for my wife once it's available in my country.