Why do people use Dex?

Could you elaborate on the reasons why individuals and entities opt to utilize decentralized exchanges (DEXs) within the realm of cryptocurrency trading? What are the primary advantages or motivations that drive their adoption, and how do these DEXs differ from traditional, centralized exchanges? Are there any specific use cases or scenarios where DEXs offer a more compelling solution? Additionally, are there any potential drawbacks or concerns associated with using DEXs that individuals should be aware of before making a decision?