I'm hoping for the inverse -- where autonomous vehicles will be restricted to their own lanes so they don't interfere with the efficient traffic. Kind of like the slow lane. #DumbLane
CC licenses do not supersede Fair Use or Fair Dealing. Even if a work is licensed CC-NC (Non Commercial) then, for example, a for-profit newspaper can still use it if it falls under the "newsworthy" fair use or fair dealing.
Changing a CC license to something more restrictive is ineffective (and I'm not sure everyone understands that). If it can be shown that a more permissive license existed when I used it, then I can share my copy out again under that license, even if the creator has changed the license to something else.
Ratcheting down copyright restrictions (or increasing CC permissions) over time seems like a reasonable compromise. You can always grant more liberal permission, either individually or in general, but once you've released something with a particular CC license that level of permission is irrevocable. https://creativecommons.org/faq/#what-if-i-change-my-mind-about-using-a-cc-license