Paper is less sensitive to aging than film and the consequence of it less severe how do you benefit?
The trouble with a "use by date" is how do you set a date?
Emulsions are just like food in that they degenerate at different rates depending on storage conditions.
Leave it somewhere hot and it goes off fairly quickly
Put it in the freezer and it lasts a very long time
With food they put on an ultra cautious sell by date as the consequences of eating contaminated food are severe and you end up throwing lots of it away
With film you might loose the days photographs with all the subsequent costs involved of repeating the shot.
In case you hadnt noticed - the use by date on film has got considerably shorter over the years just to protest the manufacturers from needless complaints.
With Paper the worst you would get is a print with higher background base fog - its still usable but not for an exhibition print.
For paper - another other consequence would be photographers increased paranoia in only buying fresh stock, so the stores would have to be ultra careful in both stock volumes and its rotation which leads to fewer retailers and higher distribution costs.
You could of course date the paper yourself when you buy it and say after 2 years just throw the remainder away just in case
My personal approach to papers long but finite shelf life is to consume the stuff turn it first into prints and then (inevitably) into recyclable material (LOL)
Merry Christmas everyone
Martin