I don't know, I feel like I need to stick up for NLOTH a little bit.
Yeah, the album has some clunkers, to be sure. But damn, I think that was U2 really trying to be ambitious and stretch their wings. Did it always work? No. But I'm glad they did it anyway, and we got some amazing, all time classics out of that. NLOTH, Fez, and of course MOS. I mean...f*ck MOS, at this stage in their career? Parts of that record are just flat out bold and sonically adventurous like people want U2 to be...not concerned with pop radio hits. Don't get me wrong, the bad songs on that record, like dan_smee said, sound unfinished and not ready for prime time, and they bring down the whole record. But I would have loved to have heard the early concept for that album before Iovine got into their heads.
SOI is great, don't get me wrong, I love it. It's just what U2 needed right now. You could not dump NLOTH into 500 million iTunes libraries, you just couldn't. And we all agree that SOI is a more even and cohesive listening experience vs. NLOTH. So I'm not taking anything away from that record. But there's nothing as ambitious, IMO, on it as some of the best stuff on NLOTH. To the extent that SOI is a success and NLOTH is a failure, it's this...SOI aimed to be a solid collection of mainstream pop/rock songs and succeeded brilliantly. NLOTH aimed to be a sonic adventure like TUF, JT and AB and failed.
I don't know man, they're different albums with different goals. I don't see the need to throw one under the bus because something new and shinier has come along. They are both great, but different, records.
That said, SOI has managed to make me excited about U2 again it's getting me wanting to go back and listen to their studio records front to back again...something I haven't felt like in a long, long time.