i'm doing some readonly stuff right now and clicked this thread!

I only skimmed it quick.  this involves reading sentences from the middle of the abstract, from materials and methods, and from the conclusion.  here are fun points regarding this random article:

- presently described using research-grade femtosecond lasers, optics, etc, because their setup is organised for comparison of approaches, not uses

- similarly their paper reportedish 1-200 K/s write speed 1-100 b/s read speed, with pointers for how to develop new setups with MB/s speed.

- high density due to 5 degrees of freedom to the artefact written to the transparent medium

- other uses in shaping detailed nanomaterials