If RC prints are processed to archival standards then they will certainly last a very long time indeed, In hesitate to say that they will last as long as FB prints simply because RC paper hasn't been around as long, but I started using RC paper almost as soon as it came out, I still have prints made on the very early paper and I can't see any loss of quality on either the very early Ilford or Kodak paper, so I have no hesitation in printing for myself, for exhibition, sales or other on today's RC Paper, in fact I prefer to print on RC paper as I think I print better on it, many people prefer my prints made on RC, and mounted you have a very hard time telling the difference between RC or FB paper,