Major remaining tasks towards graduation:

• Add fuse-overlayfs storage driver (PR: new storage driver: fuse-overlayfs #40483)
• Support cgroup with cgroup v2+systemd driver (Issue: cgroup2 check list #40360, PR: rootless: support --exec-opt native.cgroupdriver=systemd #40486)
• CI for test-integration w/o testutil/daemon (PR: hack: support $DOCKER_ROOTLESS for testing rootless #40538)
• CI for test-integration w/ testutil/daemon (PR: test-integration: support more rootless tests #40689)

Non-blocker:

• CI for test-integration-cli
• Consider reimplementing installer (issue rootless: move non-curl part into moby/moby/contrib (docker-rootless-extras.tgz) docker/docker-install#163)

Note: Red Hat moved Rootless Podman out of "Technology Previews" in RHEL 8.1, without supporting cgroup.

So maybe we can declare Moby's graduation from experimental without supporting cgroup as well.