Nibs have always been interesting to think about, as a lot of companies who have bound necks avoid nibs like the plague. Martin guitars usually don't have bound necks, and when they do, the frets go over the binding I believe. Ibanez guitars, even the high end Japanese signature and hollow body models, have the frets over the binding. I think Taylor guitars does as well.
However, with binding, that means you don't really need to dress the fret ends, which saves time. I've seen some articles by Dan Erlewine regarding saving the nibs when refretting. However usually they are a pain to deal with if you want to refret the guitar. You need to have the frets perfectly measured or when you hammer them in they may not fit.