I think the lack of 'serious' responses to cashpiles' posting kinda proofs its points. But, I believe, it also proofs the power of fandom/the love for something: it's not about searching for flaws or taking a rational look at the subject, but acknowledging the parts that make it special for you, which in most cases is a totally irrational affair.
Thus, if it's dawning on you that something might actually not be that great, because the stuff you could forgive in an earlier time is really buggin' you now, I guess, that's a signal for yourself that you've moved on. In that case to other bands / music. And that's fine. And I think, that's what cashpiles was all about in his posting.
It's happened to me with NIN for the same reasons. I'm still checking for new music though, because for a time in my life this band has been a thrilling part of my life. TR also introduced me to a lot of great bands and music I otherwise would have never / not yet explored. So I'm thankful, but I've moved on.