And that is the problem with all these lovely images people have been posting. Until they’re feasible as video, they’re not particularly useful.
They’re all feasible. It’s just a lot of work.
This kinda makes me want to bring back this thread: https://originaltrilogy.com/topic/A-Collaborative-Star-Wars-Saga-Edit/id/60169
These changes are very nice, but way too much work for one person. But a group of talented editors could pull it off- it’s not just one guy who does the vfx in Hollywood.