I think all the data is here already,† but presented in an incomprehensible fashion.
† (Except whether a cable might be limiting the throughput, which I think would be very useful to know.)
I feel like if USB-C is such a mess where cables all look the same, having something like this to debug would help a lot.
I didn’t include power delivery, btw, which would also be helpful to know – I just don’t understand it very much.
@mwichary What I find really impressive is that I'm using a really old keyboard at work, I don't know the model. I can send you a picture of you're curious, but it's old enough to have a physical wheel for volume control.
I can plug a modern mouse into its USB ports and it works fine, though when I plugged my USB key in, it gave me an insufficient voltage error, So I suspected USB 1.
But I can still use this with my current laptop, and everything works normally!