I suspect many users will probably accidentally plug stuff like external SSDs into the slow port without realizing. It's maybe too much to hope for at this price point, but would have been nice for a machine with only two ports to be able to offer the same spec USB on both ports.
My instinct would be to use the socket towards the rear of the machine as my charging port - it's closest to the corner - but in doing so you use up the "good" USB-3 port leaving you with only USB2. It's not a huge deal, but charging in the other port to free up the USB3 one feels slightly weird to me. I suspect most users will charge off the USB3 port given its location.
Reading the spec sheet, it also looks like DisplayPort is only supported over the USB3 port too - again there appears no way to know just by looking at the ports. This has never been a problem on any of the Apple Silicon 2-port MacBook Airs, as those have always had the same specs on both ports and could drive a display over DisplayPort from either.
At least we should both be happy that it exists, no matter where it is placed! This is a big improvement over the macbook 12 with just one port. This was too low even when using a dock.