Ian - I wouldn't go around placing bets on what fades and what allegedly doesn't. There are plenty of susceptible dyes in the makeup of inkjet inks too. Actual pigment prints, they're not, and even if they were, UV can get to almost anything over time, unless your color palette resembles the surface of Mars.
I've got hundreds of Cibachromes that look like they were made yesterday. Yeah, you want to keep them out of direct sunlight and high-UV artificial sources. But I've got one of my very first ones on a wall behind me. It sat in mountain window light for 25 years, and overall, has been on display 45 years now, and still looks beautiful; a bit of the yellow dye has shifted. The worst thing for Cibas were the hot "projector" halogen lamps once popular in galleries. I've seen those actually melt the acrylic colors on major works by famous abstract expressionist painters within a week or two. Just plain dumb.
In terms of more recent Fuji Crystal Archive media, I had fifteen big 30X40 on display under clear overhead skylights plus 18 hrs per day under quite no-no high-UV commercial CFL lighting before the building sold - 15 yr of torture. I overprinted them a bit, so that they look just about right now. Another 15 yrs should be no problem, now that some of them are being displayed under much kinder lighting. If that had been the case all along, then Fuji's projections of a 75 display potential seems entirely credible. And their more recent RA4 papers have improved in that respect even more.
I doubt I'll even be around another 30 yrs, and inkjet technology is barely 30 yrs old, so
making premature claims about that is presumptive. I always sold my own prints with a bit of advice about how to protect them from fading or mildew, etc, and it seems the advice has been followed by collectors. But big huge decor pieces are going to get inevitably abused with respect to lighting, and will likely get thrown out when the sofa or drapes are anyway.