Most SSDs only guarantee your data for 90 days when off. Even high grade, SLC, professional SSDs. Hard drives fare better, but your best bet for decade-long conservation remains tape.
In practice, hardly anyone uses up the entire write endurance of their SSD, especially not if they're using it to store backups, archives, or other relatively static data. Flash memory that isn't worn out has much longer retention times.
You'd think there'd be a market for long life HDDs.
Edit: Yes, you could just replace old hardware with new hardware, but it creates so much waste...
It apparently uses a similar basic process as those mall kiosks that take a volumetric picture of your face and then etch it into a cube of glass?
But in this case, they just write the data to the side of a small piece of glass over the course of days and it's basically permanent for all eternity unless something breaks it.