"Envisioning Terabytes Encoded Within a Millimeter-Sized Crystal" because, so far, they have only shown that you can charge and measure a crystal structure with

"Envisioning Terabytes Encoded Within a Millimeter-Sized Crystal" because, so far, they have only shown that you can charge and measure a crystal structure with light. What they did not, however, provide any measurements on, is if the resulting excited crystal state is stable and for how long. But that would have been, in my opinion, the key differentiator how this could be more useful than phosphorescence, which is also optical charging and can be measured optically, but is always only temporary.