Certain scientific applications require really large amounts of raw data, collected from sensors and the like. Radio telescopes, for example, require each sensor to send petabytes of data to a central place to be analyzed. For example, the Event Horizon telescope has sensors all over the world, and hard drives of the recorded data get sent to be analyzed in the United States and Germany.

For residential applications, though, yeah. There currently isn't much of a use case for sneakernet where you can get terabytes of data with latency above a few days.