AWS re:Invent 2021 marked a significant return to in-person industry events following nearly two years of virtual gatherings, highlighting the value of face-to-face interactions that virtual platforms couldn't fully replicate. The event showcased various highlights, including the successful AWS Financial Services GameDay, where attendees learned about accelerating cloud migration and building resilient applications using AWS, Gremlin, and other technologies. Chaos Engineering emerged as a prominent theme, with increasing awareness and adoption driven by the need for reliable applications during the pandemic. The event also featured numerous announcements from AWS, such as real-user monitoring for CloudWatch, enhancing observability and system reliability. As organizations look forward to more in-person events, initiatives like GameDays are seen as essential for fostering a collaborative Chaos Engineering culture and ensuring reliability in distributed systems.