AWS has made several major announcements at its re:Invent 2021 conference, including the introduction of EC2 M1 Mac Instances, which allow developers to build applications for Apple's M1-based systems. The company also announced AWS Private 5G, a service aimed at helping companies set up and scale private 5G networks in their facilities. Additionally, Amazon SageMaker Studio Lab was made available as a free resource for users to learn about and experiment with Machine Learning. Furthermore, AWS introduced Karpenter, an open-source Kubernetes cluster autoscaler built with AWS, which simplifies the deployment of Kubernetes clusters by automatically allocating resources needed to match workload requirements.