In the context of exploring current trends in digital forensics, including cloud computing, social media challenges, AI impact, ethical considerations, and security appliances and technologies, how do these factors collectively shape the landscape of modern digital investigations? Specifically, what are the unique challenges and opportunities presented by cloud computing and social media platforms in terms of data acquisition, preservation, and analysis? How does the increasing integration of AI impact the efficiency and accuracy of digital forensic processes? Lastly, what ethical considerations arise when leveraging security appliances and technologies in digital forensics, and how can we ensure responsible and transparent use of these tools?