4K is also pretty pointless for a scan of a 35mm exhibition print - it’s definitely useful to have the scan at 4K, because of cropping and such and a 4K scan will be more detailed when scaled down to 2K than a straight 2K scan but for the final product, 4K would make practically zero difference - there could be a huge difference in detail if working with the o-neg or even an IP but not from a print - I experimented with this.
What if it was a 70mm print?