Actually, I view all audio from a ratings point of view; what I'm speaking of is some kind of metric to judge the quality of components.
I spent two years visiting high end emporiums, and auditioning components, comparing them to how they were rated in "Stereophile"; meaning "A"; "B"; or "C". I read how a component was rated in the magazine, then went to the Emporium and asked to audition that component. Just as there are many flavors of ice cream, there are many flavors of sound; for example Conrad Johnson, and ARC are at opposite ends of the spectrum from warm to cool, but both have models that are rated Class "A".
Every building has a foundation that it sits on; that rating system is "Stereophile's" foundation, they don't play games with it, and I found it to be quite valid. There are many different flavors in each class, but I more or less agreed with "Stereophile's" ratings in regard to whether a component should be rated "A"; "B"; or "C".
I was not in analog at that time, but as I recall, no Emporium had expensive cartridges that you could evaluate, and you can reason why they didn't.