While this sounds a bit like vanity, and something that would be impossible to explain through a simple radio play, it is worth noting that the original "head music" album is now forty years old.
There's a very good reason why no one has equalled The Dark Side of the Moon in scope or artistic achievement--no one wants to put that many good songs on an album that runs in sequence. The music business has abandoned the "album" format (roughly 38 minutes of music divided into two sides) and focuses on downloadable singles. No one wants to dump all of their singles onto a single project and then have to contend with how to market that work to a public that wants music in slices for free.
Along with the demise of the album you have the abandonment of the B-side as well. How sad.