It's all pretty confusing. I can honestly say that out of the 2000 odd CDs I have very few sound bad, differences certainly, but not bad or anywhere near unlistenable.
I am amazed that the damned 80s CD sound as good as they do and have upgraded very few as I'd rather hear some other recording that I've never heard than repurchase. LPs, RVGs, McMasters all generally sound excellent. Whilst I love LPs they were/are very inconsistent, much more so than CDs. I just dont see the point in much of the argument going on here. It's the music that matters.....