Just because it's not your use case (and maybe you'd find a use if it was available), doesn't mean it's not a common one. Market opportunities get missed all the time. People have been making do with offline HDDs, which is a waste of their potential, and they're now victim to the RAMpocalypse price hike too.
Just as an example, people would probably take a lot more video with their oh so capable phones if there was somewhere to put TBs of it cheaply.