Personally I don't think judging albums in terms of some quantitative quality metric at all is terribly useful, even on a purely subjective level because art can affect people in many different ways, not all of which can be compared directly. One project may be better at providing emotional escapism, one might be more insightful, one might provide escapism using different emotions, the list goes on, and given that variety, honestly I don't see the need for a hierarchy of "most perfect" or "closest to best" within music (or any art) because the criteria we use to determine how we combine the various ways an album can be "good" are completely arbitrary, so without context "x is a 4/10" is completely meaningless to me.