poita said:
At 4K you are looking at about 20TB per film, minimum, the storage alone, even at the end of 1995 when prices dropped to $300 per GB it would have cost around 6 million dollars to store a single 4K scan of the film, and the computers of the time would really not been able to handle it.
Snow White was restored in 4K in 1993. I believe the Cineon system relied heavily on tape storage.