My problem with BD is that I see it as an involution from what U2 is capable of doing. After Pop, which I rate as U2's 2nd best album just behind Achtung Baby, I couldn't believe my ears when I received the BD snippet in the "love suitcase" U2.com sent its subscribers. I almost threw up. I couldn't believe that a band which throughout its career had made a point of upping the ante with every release and never sitting back in the comfort of success, was making such a blatant concession to the mainstream in a desperate move to avoid being shoved into the cult band niche they were being headed to.
Probably the books will name BD as the song that bought them another decade of success. However it's another decade of commercial success, but certainly not a decade of artistic relevance (parts of NLOTH seem to give a light of hope, but they're not even playing much of the album on its own tour!). I'm certainly not against commercial success but not at the price of compromising artistic worth. In my opinion BD is not, as a U2 song, artistically relevant, so even if it has been hammered into people's brains because it has been overplayed to death on the radio and on every tour since its release, it will never be a classic in the way Streets, NYD, One and others are.
It's sad for someone who has been a fan of this band for almost 30 years and has lived through their increasingly exciting metamorphoses, to see U2 stay relevant thanks to obvious and almost embarrassing tunes which would have been unthinkable at a time when the band was putting more energy in pushing their own limits in the making of groundbreaking music than in trying to please audiences.