Oh, in general, I just post those for fun. When dynamic range values (average of the whole album) drop below 8, I start paying attention. Meaning, I start thinking it might sound compressed, harsh, no differences between loud and soft passages. Metallic, etc.
As if often said, the DR values can become another way of sort of sifting through all the different versions of albums. What often happens with an older recording is...the original has super DR values, and lots of times, you can hear the quality. If that same album is remastered in recent times...most often the remaster has been brickwalled. DR values plumet......and the overall sound quality is crap. Just, crap.
Now, this certainly does not happen all the time, but I believe, more often than not. Unfortunate.
For the record, whatever CD version I have, I honestly could not tell the difference between that and the SHM SACD I have. In fact, the CD sounded damn good. It was louder, but that's about it. Volume knobs take care of that typically.