The main thrust of the paper is that under certain assumptions, flash/solid-state/etc memory ("storage class memory") may already be competitive with spinning hard disks or tape for long-term archival storage of bulk data.
The abstract would have been more helpful had it alluded to the definition, for example "…of storage class memories (SCMs), such as flash memory, has been…".
Similarly, the term isn't defined on first use, and even following the footnote which strongly suggests definition/discussion of the same topic elsewhere ([21]), that particular term doesn't appear in the referenced Rosenthal "Keeping Bits Safe" article.
(Now I know, but I'm still not a fan of the term. At these levels of abstract analysis, it's all 'memory', and it's all being considered for 'storage', so storage class memory lacks vividness/contrast.)
How do you like Crystal Ridge?
Crystal Ridge? (If you mean the nursing facility, still hoping for a more Rainbows End arrangement.)