Dear @edgewear: You really have a misunderstood on those words: stupid and ignorance, because both are way different and the meaning is totally different.
Ignorance level on any life subject means only to be unaware of that subjects or its ignorance level is higher in that subject that other person but ignorance just DOES NOT MEANS that person is stupid. No way, stupid word is used on very different sentences by any of us. You can read here about:
http://www.dictionary.com/browse/stupidhttps://dictionary.cambridge.org/dictionary/english/stupidI own many vintage audio items that I bougth not because I'm stupid but because I was totally ignorant of the facts that many of those vintage were behind in its true quality level performance and was years before that I learned about an puts some on sale and been sold.
But I have to learn and took me several years to do it and in the mean time I was not only hap´py with but exited to own it.
What happened when I learned ( step by step/tests. ) about?: simple that my ignorance levels on those different subjects improved and lowering that ignorance level.
After learned with the MS TT you can be sure that today I don't receive it not even as a gift no matter what ( only to put on sale and make money with. ).
You said:
"
I’m sure this will also be the case with the heavier plateau of the RX-5000, although you might need the heavier CU-500 mat for this. But Micro apparently knew very well what they were doing......"""
that statement speaks that you think tha " MS knew very well what they are doing.."". Certainly MS did not know what they were doing because if they knew what they were doing never been designed that terrible ringing platter, the design is FAULTY just from the begining.
They were ignorant about, had not awareness on the subject but were not stupid.
Btw, NO ONE is stupid only because is ignorance level is high against other person that's lower and of course that exist persons that are unaware/ignorant of something and at the same time stupid. Stupid is a person not able to learn for whatever reasons.
So, ignorance is not synonimous of stupid.
R.