Oh, don't get me wrong, I'm very happy with the way all our numbers are heading. I just don't quite understand how it is that in the US we've come to latch onto

Oh, don't get me wrong, I'm very happy with the way all our numbers are heading. I just don't quite understand how it is that in the US we've come to latch onto the positivity rate as a meaningful measure of stuff. In the UK and Europe, they routinely report the R0 (...or other related measures), which is a zillion times more useful when thinking about how the pandemic is going.