We have VMs and deploy using Ansible, devops doesn't have to mean running everything in containers using Kubernetes.

Our applications are mostly monoliths and the number of servers they use is quite constant.

But it does mean our Python version really only changes when we switch to the next Ubuntu LTR, and isn't always the same between different projects.

I hope you realize not everyone running python is running web apps. There are huge companies that use python for automation and they all run from some computer grid storage (usually NFS) and are imported in the same environment as the client instead of having a server side environment separated from the client side environment.

98% of my containers are not web apps.

Still a lot easier to manage as docker volumes in k8s.