Well not universally.... It's massively acclaimed by music fans and critics, its never going to be as acclaimed in an open public vote. There are levels of esoterica. Van Morrison is a well known singles act, he's pretty much an esoteric album act. Within his catalogue, Astral Weeks isn't esoteric, its well known but Veedon Fleece clearly is. Bowie is not esoteric at all. Everyone knows at least a few songs off everything from Hunky Dory to Young Americans and the song "Heroes" and a lot of normal people who just listen to the radio maybe even know all of a couple of those albums, particularly Ziggy. None of them know Low, or more importantly if they do the likelihood of them liking it and comprehending it being by that guy who was Ziggy is low, therefore it's an esoteric album within his catalogue.