Photo papers have never openly carried a date stamp, they shouldn't need one.
I suppose that I am dating myself, but I can still remember the first box of paper that I purchased which did not have a date. I would think that all of the reasons which once motivated the dating of paper packages would still apply, and possibly more so because of developer incorporation which seems to make modern stock less stable.
It would seem that Ilford is following the modern business model of shifting as much of the quality control and assurance cost as possible onto the dealer, who than passes it along to the ultimate consumer; it would be nice to think that the savings are also passed along, but if that ever happens, I haven't been able to spot it.
The grocery-store comparison is not particularly apt, at least in my neighborhood. The distributors often stock the shelves according to the anticipated sales volume, and take back unsold merchandise which is near or at expiration; they move it to stores where turnover is faster and scrap it only as a last resort. If products weren't dated, they would be impossible to manage intelligently (come to think of it, that sort of describes the situation with photo paper, doesn't it?).