Damage done. It became a great example of why it isn't a good idea to rely on an engine operated by a corporate entity, since there's always a chance your product will be directly affected by some external executive's random choice.
Docker Desktop now has a license cost for medium+ sized businesses. Docker Engine remains open source, but the desktop UI as well as the tech that makes Docker work on Windows (and Mac?) is now no longer free.
Thankfully containers are open source.
Everything is "docker this" and "docker that". But podman is viable, and there are other container systems.
The container format is so ubiquitous it's FOSS. I mean, it's kubernetes.