re: No word on actual data transfer rates.
About 10 hours per access operation, minimum according to the article. Really slow but high density and long life. A USB stick might be 5 to 10 years. A writeable CD left on window sill less than a week?
An old HDD in a drawer might last a long while (not sure about shingled or other very density).
Tape can last 20 years if stored properly, you need to make copies as slowly get print through.
I think Magneto Optic storage was good (I remember 3.5" Sony cartridges in 1990s with 250Mbyte)