Pink Floyd should really be divided into two bands, the early band and the big huge stadium band, and there's no need to compare the two. The first Pink Floyd album I ever got was "A Nice Pair" their first two albums in one handy package, after I heard Voivod's (a metal band) cover of Astronomy Domine. I was only 15 and somehow didn't realize this was the same band as did Another Brick in the Wall and Shine on you Crazy Diamond etc. Anyway I was blown over. And Relics is my favorite album by the band all together. Julia Dream, Cirus Minor and Remember a Day are three of my very most favorite songs ever, they are so beautiful, gentle, and meloncholy. I love much of the later PF stuff as well, I inadvertently collected more of their albums than of any other band. My least favorite is (other than part two of Ummagumma, though I love Grantchester Meadows) is Dark side of the Moon because it has so much gospel-like wailing in it and I don't like "money", and the saxophone, and all the long, irritating guitar solos. Perhaps I've heard too much of it on the radio. So forget the later stuff for a minute and just compare "this" band to perhaps other smaller, alternative groups, as they were when they made this music. For heaven's sake, it's not just a collection of rarities for enthusiasts.
The album is creative genius, at times variously wistfull, too lovely for words, frightening yet soothing, emotional, and thoughtfull. I gotta say I skip Interstellar Overdrive these days, it's a bit long and grating after a few years. This is sentimental music to get wrapped up in and attatched to, I hope droves more people with fresh outlooks will discover it for many years to come.