One of the greatest disappointments of my musical life was the day I bought the ZZ Top album Tres Hombres on CD. What I heard on that disc wasn’t really the same album that was released on vinyl; it had been remixed and re-effected to make it sound more like their current post-Eliminator sound.
In its new form the whole album is bathed in a thick reverb that hides a lot of the detail. The original sounds like the band are in the room with you; the new version sounds like they’re playing in the tiled bathroom next door. Possibly inside a locked filing cabinet. Hopefully with a sign on the door saying “Beware of the leopard.” I took that CD straight back with a horrified look on my face.