What eCommerce sites do you know that have a completely different structure than what you're used to?
That's the closest I can think of. There are ecomm sites that have been around since the 90s and haven't changed much but those either still have the product page/cart/checkout structure or are functionally just catalogues and require you to place an order by phone.
Granted it's a catalog site so they are going to have a huge inventory. Still I'm surprised how usable the UX is.
Radical anti commerce initiative dude.
Or maybe a bug..
Kool topic tho, keen to see the responses.