Shortages are very uneven around here. The cracker aisle, for instance, is almost bare, but In the rest of the store most other things are generally available. Things that aren't in stock generally have replacements or substitutes that are. Any shortages tend to be item specific, as opposed to whole areas or categories.
One thing, though, has been hard to get for a couple of months: whole (vitamin D) milk in half-gallon cartons, of any brand. Gallons and quarts are fully stocked, but there are no half-gallons to be had. All other grades of milk are in ample supply.
I asked the stocker the other day what was up with the milk supply. He said that all the dairies in the area have their cartons printed overseas. Since half-gallons are the most popular size, and vitamin D is the most popular grade, they tend to run out of those sooner. Guess where all the replacement half-gallon cartons are? Yep — on a container ship waiting to enter port down in CA, where they've been for months. I don't know how factual that is, but it certainly is plausible given what I know about the port congestion.