right. i couldn't find the specific data with a quick cursory search but i did find this:

"However, they caution that although this increases the areal density of storage substantially, improvements in writing speed and energy efficiency are needed for commercial viability. This could be accomplished by using a femtosecond laser beam with a higher repetition rate and a more sensitive photoresist than those used in the current system.

This means the nanoscale optical storage system is some way off from any commercial availability of drives and media, but the researchers assert that such products should prove less costly than current state-of-the-art optical disc libraries and hard drive arrays for meeting the vast data storage requirements of the AI era."

https://www.theregister.com/AMP/2024/02/23/optical_disc_breakthrough/