I agree! If the feature won't give us useful troubleshooting info as built (because, perhaps of hardware limits) it should probably not be shown as an option on the other devices. In my example, I have a small campus with interconnected fiber links and was assuming my poor results from a switch/AP's which are downstream from the MX via Fiber might indicate bad fiber/transceivers but testing back at the site with teh MX and the cicuit revealed that ALL switches and access points under-report what they are actually getting from the MX.
I think I need to understand what the tool is meant for ..
I thought it was something like: What is the box experiencing of link expectation/performance from the ISP/Cloud. What I see then is that it's more like "What can this CPU do with the link" .. All the switches seems to have same degree of performance number ..
It just confused one of our remote tech's doing troubleshooting at some wireless installation ..