Why is it mean? Why would you want to use a technology that is unsuitable for cold storage for cold storage? You won't even get the power / IOPS benefit if all it does is an infrequent replication of data and is then switched off.
I believe it has read speeds of 13GB/s, not 3 (unless you are referring to an equivalent array of 10 HDD). It will almost certainly be used to store training datasets and model weights. Which I assume are good use cases for fast sequential reads.