Store's Sour Cream vs. Restaurant's Sour Cream

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In my opinion the sour cream served at the restaurants taste way better and is more rich and fresh tasting than the sour cream that we buy from the store. I have been searching for restaurant quality sour cream at stores for a long time now but I can't find any! Do you know where restaurants get their sour creams from? Do they make it fresh themselves? Why does it taste sooo much better and different compared to the sour cream that is store bought?