1. Maybe he saw the success financially of the prequels, and thinks everyone is hunky-dory with the state of the SW saga?
2. Maybe he just lives in a box, and just has no idea that there is a demand for the O-OT?
3. Maybe no one at Lucasfilm has the guts to say to him how much the older fanbase is pissed off at the changes, and how alienated they have become, and thinks everyone loves the new editions?
4. Maybe he is just stubborn and hates the originals, especially ANH, so much he will never put them out?
5. Maybe he just doesn't care, and these are the final editions and we have to live with it?
A couple of theories, what you think?