I think this comment from the comment section summed it up nicely
No one cares about liner notes
For years now we have been hearing about the "value adds" that liner notes an album art brings to some nonexistent view of music listening. You know what? NO ONE GIVES A CRAP ABOUT ALBUM ART OR LINER NOTES. That stuff might have been vaguely interesting before everyone had unlimited access to a band's web site, but now it's all just garbage. The only utility in the art is that it shows a nice icon on my ipod. That's not something worth paying for, and no way in hell people are going to drop mp3 or aac just to get them.
Indeed, try google, wikipedia and allmusic, for starters to supplement the "official" web site.
Then there are the obsessive fan sites that seem to know more about the artists and their work than the artists themselves. Handy for dead/obscure artists / pre-internet groups.