That’s just straight up factually incorrect. From the link:
As a storage technology, Silica offers volumetric data densities higher than current magnetic tapes (raw capacity upwards of 7TB in a square glass platter the size of a DVD), and using beam steering of the laser beam, we’re able to achieve system-level aggregate write throughputs comparable to current archival systems.
micrograms, which is 1/1000 of a milligram. No amount of lead is considered safe, but you would need to eat allllottttttt of this chocolate before it would get to a level that, for example, a doctor would be concerned about. Ars Technica has a good write up about the CR report
Not that I’m trying to shill for Big Chocolate. When I saw the report, I definitely made a conscious effort to cut back to once a month or less.