When reading about linking containers together they now call it legacy links e.g. here.
This article claims links got deprecated in Docker 1.9, but the release notes doesn't mention this and the list of deprecated features doesn't mention it either.
Question
Why does Docker now call links for legacy links? And should I stop use them?
Docker networking is being promoted as successor - https://docs.docker.com/engine/userguide/networking/
Before the Docker network feature, you could use the Docker link feature to allow containers to discover each other. With the introduction of Docker networks, containers can be discovered by its name automatically.
On whether you should stop using them - yes. The docker world is currently moving very fast, and links has been "legacy" for a few releases now.
