I think it's more a question of domestic transport. At one of our local groceries stores, they were out of pasta (of any kind) for three solid weeks. Now, it's back and there have been no issues since. There's nothing magical about pasta. It's wheat, water, and eggs -- all domestic products, so it shouldn't be due to, say, overseas shipments getting hung up at a port.

I've also noticed that one store has been out of canned pineapple for a couple weeks and yet another local store has plenty of it. I can buy fresh pineapple, with no problems, at the same store that's been out of the canned.

The DC truckers parade may have been the catalyst for the missing cheese by-products (kek). Give it a week or two and it will probably be back on the shelves. Where I live there's been no issues with obtaining cheese.

What I've noticed, overall, is that you can generally get what you want, just maybe not on the exact week you want it. There is always other alternatives that you can buy instead. The solution is to stock up when you see it.