What's a concept or idea in music that is easy to ridicule, except for the fact that the end product turned out to be great?
In Todd's video on Limp Bizkit's Results May Vary, he refrains from trashing their cover of "Behind Blue Eyes" on sheer principle, saying that someone as hated as Fred Durst singing a song that Pete Townshend wrote as a villain song could actually be a brilliant idea.
While this didn't turn out to be the case, and it wasn't hard to imagine a Limp Bizkit cover of a Who song being bad to begin with, I do think it's always a lot easier to claim that something was a stupid idea when the end product doesn't deliver, as opposed to when it actually works.
I'm curious to hear some examples of something in music that would (or did) have people facepalming, only for the result to prove the people involved to be crazy like a fox.