I would agree that to (probably) a lot of folks mixing audio output plots and mains FFT plots will be scrambled in their brains and misinterpret the results.
Yet, I feel when measuring the (differential ONLY) mains filtering effect plots help and show what at least some folks want to know.
The confusing part would be SINAD for mains measurements and the fact that folks won't understand why it is not of any consequence.
Yes, there are no common mode things which add much more audio-gremlins than differential mode (what is tested here) and yes the effect of things like DC offset are not shown but can be helpful in
some cases where folks hear transformers hum and are annoyed.|
That doesn't mean its a pointless addition in a device that seems made to tackle mains related issues for which it is done.
I do agree with not trying to fix what does not need fixing and debunking the silly audio myths about improved fidelity which are not founded. For this the reviews are fine. They do not cover common mode issues which could be much more of an issue is correct criticism but we cannot demand Amir to also buy/have built an EMC lab or just 'wing' something to satisfy some folks.
My suggestion to
@amirm would be to make the reporting a bit more suited for dummies as well and or elaborate a bit more or perhaps explain it in a video what the goal is and what is measured and why. Maybe this could result in less confusion and comments.
Yes, it will consume more time and thus one review less but may save everyone some stress...