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I'd love to see her in 4K, especially her 6 on 1 swallow dap scene, SZ1063.

Pointless if it was not shot with a 4k or higher camera.

Hopefully some of her scenes were shot in 4K, but if not surely they can upscale them and significantly improve the quality.

Some other scenes in that range are at least 1080. It just depends when they were made public, not when they were shot.
Unfortunately xxx doesn't seem interested in upgrading old scenes, so they will never ever be available in their original resolution.