At least in the case of 37signals, they went with colocated servers, some type of KVM and their own tool, Kamal, for containerized deployments without the compl

At least in the case of 37signals, they went with colocated servers, some type of KVM and their own tool, Kamal, for containerized deployments without the complexity of kubernetes. You can find one post here with many links at the bottom https://basecamp.com/cloud-exit https://basecamp.com/cloud-exit