That seems like a quibble over definitions. I'm not aware of traditional finance offering exchanges without order books, I think Uniswap is new in doing that. B

That seems like a quibble over definitions. I'm not aware of traditional finance offering exchanges without order books, I think Uniswap is new in doing that. But it is still an exchange. Speaking broadly, finance involves trades and loans and bets on future prices, and pretty much anything defi does will fit into those categories, even if it does it in a different way; anything that doesn't fit in those categories won't be called "finance."