Repeating a word or phrase in songs isn't a bad thing unless it becomes chronic. For instance, dream out loud is something that makes U2, U2... I am not going to knock them for something like that... Now if it becomes more extensive, than their could be issues or if song after song are making use of old ideas. I do think that is more of a problem than the repetition of any one phrase or idea. In other words, the repetition of a word or two in multiple songs is not a sign of lyrical bankruptcy. U2 aren't the only musicians to use love in many places. It is a common theme of music. Religion and spirituality can be too.
Rather, it is how the words are put together. When all the examples of cringe-worthy lyrics come forth, they are the sentences that are cringe-worthy. It is occasionally words when we look at items such as the tech-speak or specific vs. vague descriptions.
I do find the tech-speak a bit bothersome, but it isn't necessarily new. They used similar modern/consumer/tech language in Zooropa (the song) as well as other places. What I hate about tech references is when they aren't really used right or they are talking about something with a limited breadth. Speaking about items and actions in a Mac OS just sounds silly. They could have been more vague and said the same thing without sounding silly. It will sound even worse in 10-20 years when the OS's have changed so much no-one will fully know what they are talking about.
Thinking about the example Jick made about records and CD's... That doesn't bother me. Records and LP's were a long lasting technology that connect with the music industry. I suppose cell phones and ATM machines are more broad, but they could have done better; maybe it won't seem that bad in 10 years there. I think it just ends up in context and use. I like subtlety in lyrics, which is why I think the technological references in Zooropa and Lemon work for me while the cheesy, cliche use is bothersome in a song like Some Days Are Better Than Others (to keep with the same album for good and bad). U2 have, in fact, had bad songs even in their best times.
Ultimately, as this thread goes on, I see that lyric writing definitely isn't easy. And, their lyrics are still not bad with respect to most other bands and musicians out there. Of course there are better lyricists, but it seems there are fewer and fewer good ones overall.