I don't know that that's true; Google and Microsoft seem to have really started betting on Docker and, for better or for worse, they are big trend-setting companies, so I suspect it's more likely that one of them would purchase it and continue working on it before it just goes away.

Google and Microsoft have really started betting on containerization. Neither has really started betting on Docker.

Considering Google, Azure, AWS, DO, IBM and others all have cloud offerings centered around Kubernetes with Docker compatible containers, even if some of the tooling changes, I don't expect that "Docker" will really go anywhere. I would be surprised if the next step doesn't have it swallowed by one of the above companies (probably not DO though).

Even for AWS Lambda, I use docker to build linux lambda packages on non-linux environments (docker for windows/mac). The easiest way to get a service up in Elastic Beanstalk is with a Dockerfile.

Even if Docker (organization) does die, Docker (open source tooling) will live on for a very long time. And although I do like where podman and others are coming from, I don't think that it will displace docker in the long run.

Boot2Kube Linux distros will be the norm

One of the daemonless tools out there now or some interface specifically for Kube will exist as a dependency

Docker is more than just a runtime.