@clearthink, if these esteemed reviewers with all of their years and years of listening and critically evaluating equipment cannot reach a clear evaluation through blind testing then we are forced to conclude that either the differences are so subliminal as to hardly be worth the bother or there aren't any.
Let's face it, subliminal differences are of little use to most of us audiophiles, but blind evaluation must always reveal major ones, ones that we can hear 365 days a year, ones we are all interested in. I can't speak for others but I have no interest in pursuing subtle subliminal improvements when I am looking to upgrade. Many years ago I started with a Rega 3 and later upgraded to an LP12. Was it an upgrade? Yes. Was it worth the expense and trouble? No, but that's another story.
I agree that their opinion of reviewers is far from being the final word but its beginning to look as if that opinion is almost entirely worthless. Little more than subjective rambling in most cases. Unfortunately many still rely upon reviews even in 2019 instead of regarding them as no more than light, but frivolous entertainment.
HiVyNyws channel is one of the very few left that doesn't pull his punches. But then he's reviewing vinyl where real (as distinct from imagined) differences are easy to demonstrate.
https://youtu.be/E4G7hSUQoO
In cases where home auditioning is impossible perhaps we need to go back to evaluating and buying gear on specifications once more? If you know how to read them they can tell you at a glance a lot more than some lilly livered critic ever will.