AWS re:Invent has seen an estimated 50,000-plus people attend the event, with a focus on emerging fields like AI and machine learning, as well as databases and infrastructure. Amazon announced new hardware, such as Inferentia, a processor designed for high-performance AI applications at low cost. The company also launched AWS Managed Kafka as a public preview, which has sparked concerns about the impact on open source projects and their communities. Additionally, AWS supported trends in blockchain and NewSQL databases like SingleStore, Amazon Aurora, and Google Spanner, with new features and offerings announced for its relational database, Amazon Aurora Global Database, and NoSQL database, Amazon DynamoDB. The event also highlighted concerns about the costs and lock-in associated with using AWS services, as well as the importance of hybrid infrastructure management.