Breaking: Rancher 2.7 removed support for some old Docker versions.

Hey everyone, I just saw this news about Rancher 2.7 dropping support for older Docker versions (like 1.13 and 17.03). I'm still wrapping my head around the whole container runtime landscape.

I'm currently running a small Rancher-managed cluster for learning. Does this mean I absolutely have to upgrade Docker on my nodes before upgrading Rancher itself? I'm worried about breaking my existing workloads.

Also, since they mention moving towards containerd as the default, is this a push for us to switch away from Docker Engine entirely? I'm a bit attached to the `docker` CLI commands for debugging 😅. Any advice on the transition path for someone still getting comfortable with k8s?