I haven't yet read the full thread yet, but it looks to be an interesting one.
U2 are aging. So are each and every one of us. Who among us (U2 included) does not change as they age? At some point, U2's path might diverge from what I want as a fan ... if it hasn't already, in some of our cases.
While it's disappointing to most people to no longer like what their favorite band is doing, there's not much that can be done about it. I honestly think that if you haven't liked anything U2 has done in recent years, and yet you spend tons of time moaning about it online, it might be time to find a new hobby. Yeah, of course you're disappointed and still love the old stuff, but why waste your time complaining about everything online? (I could say the same thing for people who think U2 are money-grubbing greedy bastards now ... if you really and truly think that, maybe it's time to bid adieu to U2.)
Think of it like a relationship: sometimes saying goodbye is for the best. You've grown apart, and while it's sad and a difficult decision to make, you'll always have fond memories of the good times ... and if you're like a lot of us, loads of CDs, bootlegs and videos to keep you happy.
Me, I still like what they're doing and have been able to accept that they're an aging rock band. If they put out an album I absolutely hate next year, I suspect I'll be angsting a lot more than I am now. But even if that happens, I'll still hold out hope that they'll do something I absolutely love in the future.