Docker is basically at its core a shell around cgroups/chroots and filesystems. An overengineered shell and a confusing cmdline (which got better to be fair)
There's no "technology" there per se (on Docker "core"). Docker containers and Dockerfiles maybe? Which got eaten by other orchestration technologies there?
Exactly , Kubernetes wants to remove Docker , and the Docker orchestration layer « Docker Compose » is completely dead.
Again the founder has left the company with millions , there is no leadership whatsoever it’s a just a zombie company losing millions every year until it’ll declare bankruptcy.
Google / Redhat are very well aware of that that’s why they are trying to decouple their product ( Kubernetes/ Openshift ) from docker before it officially become deprecated .
[0]https://acloudguru.com/blog/engineering/kubernetes-is-deprec...
Or get acquired in a fire sale.
The "issues" with compose are 1) it doesn't make Docker any money, thus doesn't see much in the way of enhancements, and 2) it doesn't even try to do the enterprisey things that Kubernetes does.
Also, you can drop podman-compose in and run most docker-compose files with no or minimal modifications, so it's not like docker-compose itself is even unique.