Perhaps much depends on the initial quality of the media and how the it is stored and viewed after printing. I started to take an interest in digital imaging 17 years ago when Epson introduced the 2000P printer. I retained those early prints and go back to them periodically just to see how they are holding up. In those days I used Epson Enhanced Matte paper, full of OBAs. They are stored in bound volumes, so they get very little light except when viewed, which is not often. They are exposed to light around the top and front edges of the paper. As I open these books I see that the printed side is much brighter than the paper base from the previous sheet facing it (bound book remember). There is ever so slight a sign of yellowing at those exposed edges, but I really need to look for it. So in these conditions the OBA content has held-up very well - so far. I've had other Epson Enhanced Matte prints on the fridge door for a number of years, and they have experienced some OBA degradation, but rather evenly and still not to the extent of coming back to the colour of the paper base. It's really only all that obvious when a fresh sheet of this paper is held beside them. So depending on the paper and the display conditions one can expect different kinds of outcomes, some worse than others.