Here is an idea as a long-time audiophile, but new poster. Isn't there any possible way that reviewers can come up with a list of, say 5 songs to review equipment with?
They can use additional songs, but all reviews would at least include these 5 songs.
The 5 songs would be well-recorded, well-mastered songs with which many people are already familiar. They would span a variety of music genres. Each song would demonstrate a variety of aspects such as soundstage width and depth, instrument imaging, transient response, and so on.
One song might be, for example, Pink Floyd's Welcome to the Machine. It is a well recorded song, most people have heard it, and it displays a variety of the different aspects by which to judge audio equipment, such as imaging, transient response, bass depth, etc.
Wouldn't it be easier to understand a speaker system review, if you always had a frame of reference by which to compare the sound? "On "X" System, I found the beginning machine noises to be overly bright, as compared to "Y" System." Most people have a frame of reference to that song, so they can understand the comparison.
It wouldn't necessarily need to be THAT particular song, but at least something more popular than "Obscure Artist, and only then, on one particularly narrowly-released vinyl album". "That I've never listened to on any other system."
Choose one song from different genres: Classical, Jazz, Rock, Electronic, Country/Folk... Okay, I know there are thousands more genres. And reviewers could use them. But if they had at least 5 standard songs, it would make their reviews a lot more meaningful.
But, alas, the less objectivity in critical reviews, the better.