All would have been fine if paper were made like it used to be. Today there are chemicals in the paper so the manufacture does not need to age the emulsion before sale. They save money. The downside it continues to age very fast on the dealers shelf so the life span is 3 years. I was also told refrigeration or freezing will do but a tiny extension.
Before Ilford downsized this was all explained to me by the Ilford reps who are no longer with the company.
The big questions are how long did the paper take to get to the store. How long before they sold it to you. What is the life left when you get it.
I have some inherited 40 year old paper that works. I have some Ilford stuff 2 years old that is grey. How do I know 2 years. Marked when I got it.
Evil Kodak used to put exp dates on the paper. That`s how I know how old it is. EXP 1969.
They now date packs of Xtol. Not sure about other stuff.
If you are good observers and watch the lot numbers of what you buy, you can crack the code.
I have heard in the past that the need to age emulsion before sale is an urban myth. So adding chemicals to paper to speed this up, would also be a myth. I can see why those reps. are no longer with the company.
Really, I doubt that you can buy paper that's less then 6 months from manufacture, unless you live in the same city as the factory, and the distributor is in the same city as well.
Think about it, paper is not made continuously, they coat so much of a paper, then stop making that paper and start making a different paper, when the factory supply gets to the lower inventory limit, they make another batch. I can see common papers that sell in large quantities, being made more often then papers that sell in smaller quantities.
The distributor works in a similar manner, they order papers that sell in large quantities in larger batches and because they get to the minimum inventory level faster so they order more often.
The dealer should and often does it the same way, they might order common papers on a regular basis, and go through their inventory quickly enough that the paper doesn't age that much.
I would think an 8x10 Multigrade RC paper wouldn't be that old, and you probably would go through it fairly quickly yourself.
Where the whole system falls down is a paper that isn't used that much, it sits longer in the factory, because batches are the same size, but they take longer to sell, The distributor then brings in less and it stays there longer again. The dealer might have ordered only a box or two, but they take a year to sell it. You only use a sheet or two once in a while. So the paper is much older, if it was improperly stored at some point, then it could age quite a bit.