There is AWS Autoscaling, ECS, EKS, Hashicorp Nomad, Fly.io and the few more. However I would ask the question (same question I have been asking since the firs

There is AWS Autoscaling, ECS, EKS, Hashicorp Nomad, Fly.io and the few more. However I would ask the question (same question I have been asking since the first appearance of k8s) what do you need so much that it justifies this complexity? Implementing a simple autoscaling system or using the provided solutions like AWS ASG was and is results in more reliable infra. If you want to use cutting edge there Lamda function that most cloud vendors offer. That is also less complex option.