I also wouldn't classify Kraft slices or Velveeta as cheese, and the FDA doesn't either.
Can't say I've ever even heard of/seen this brand although their product locator shows them at the grocery I shop at, looks like the only thing sold in my state is their shredded cheddar.
>or Cabot are fancy,
Again I've never seen this but my grocery also allegedly has 3 of their products, all 2lb bricks of cheddar. Looks like a store about 20 minutes away has 20 of their products, all cheddar but weird ones like horseradish, hot habanero, port whine spreadable.
Most of the stores seem to have 0-3 of either brand's products.
You'll see a lot of Sargento's 'snack bites' and packs of 11 slices of a few varieties though but every one I've ever tried was not worth the price and was often extremely dry/waxy.
Other than that, and the fancy case, it's some store brand bricks of a few cheddars, store and kraft brand shredded cheeses, Kraft slices and Velveeta.
Not the person you asked but I'm nearly 34 and 'real cheese' wasn't really a thing when I was growing up. You had shredded cheeses, Kraft, Velveeta and maybe up to 4 cheese rolls in the deli counter at the grocery that could be sliced.
Now the non Whole Foods/Trader Joe's grocers are exactly the same with the exception of having small refrigerated sections, away from all the other cheese, with more 'fancy' cheeses at considerably higher costs for relatively small amounts. With several of those 'fancy' cheeses costing 10-20% of my weekly groceries I just don't see myself trying them anytime soon.
I've never seen any of my friends or co-workers eating, or even discussing, 'fancy' cheeses either but I bet you can go to 90% of their houses and find Kraft-style individually wrapped slices and/or a block of Velveeta.