How often does this come up in consumer environments? 6 gpbs could be faster than the NAND flash, for both read and write. 4K video is only going to be 100mbp

How often does this come up in consumer environments? 6 gpbs could be faster than the NAND flash, for both read and write. 4K video is only going to be 100mbps or maybe double that, for consumers. I guess what I'm asking is what use cases do people see for this? The only time I can think of that it'd be convenient is backing up a device, but that also can be run overnight when the device is charging and bandwidth is plentiful.