Actually I do know about that 😃 I’ve scanned many prints that easily resolve above 3K, and negatives that far exceed 4K.

The SE prints may well have been finished at 2K, we won’t know until we look at the scans, but if they weren’t we should get good resolution from them.

There are many details in the IB Tech prints from 1977 that exceed the 2160 lines of UHD, there is no way to scale them down to 4K BD and not lose some of that detail.

The area around the Tantive door is an easy place to see this, at 2K the doorframe is a uniform grey, with a 6K scan, you can see it is ribbed, rather like a vacuum cleaner tube.

Some prints are terrible and struggle to have much in the way of resolution, others have far in excess of 2K, and many, many negatives we have scanned exceed 4K and need to be scanned at 6K or even 10K to keep the resolution evident in the negatives.

We have studied all sorts of theories on this, but it comes down to actual practice, 35mm prints and negs often have details that are lost if you dip below 4K.