What is the use of dusk?

Could you please elaborate on the utility and potential applications of Dusk? As a cryptocurrency and financial practitioner, I'm curious to understand the unique value proposition it offers, particularly in terms of privacy and scalability. How does Dusk differentiate itself from other privacy-focused blockchains, and what specific use cases does it aim to address? Additionally, what are some of the challenges that Dusk is currently facing, and how is the project addressing them to ensure its long-term success and adoption?