No thanks. I prefer my jails just the way they are and think Docker sucks.

The OCI work mentioned upthread is about interface, not implementation.

Most people who think "Docker sucks" are talking about it's somewhat questionable network layer on Linux and the poor security isolation of the daemon. Non-docker alternatives like Podman don't have that characteristic.

But no one (at least no one reasonable) thinks Dockerfile's building docker images for download from docker-compatible repositories are a bad thing. That stuff runs the world. And the FreeBSD refusal to make a real attempt at interoperability is a confusing wart on what otherwise is pretty good tech.