I'm not sure "machine-owned" should be the focus. Ownership is a legal construct and I don't think a machine can "own" anything in any existing legal framework.

I'm not sure "machine-owned" should be the focus. Ownership is a legal construct and I don't think a machine can "own" anything in any existing legal framework. And typically anything "not owned" reverts to the state. Seems that the defining feature is autonomy, not ownership.