I've yet to see the numbers you list live, but in addition to pure uptime, I've seen a lot of instances where it has been used as the default communication channel instead of proper RPCs, with devastating effects on the long run from the point of view of issues, debugging, predictability, etc...

It's being overused where it has no reason to be, good and simple on paper, awful in the way many are using it. Most of the times, you don't need it.