For Justice Ginsberg to write such a lengthy and talking-point heavy opinion would appear to be a bit of a miracle in itself. Given her age, health and attention span, one would expect that even a trip to the restroom would require an escort.
It seems more likely the work of staff member(s) who have the energy and ideas.
A good idea for a game show would be: Ginsberg or 13 year old. The contestants would read an opinion written by Ginsberg, and one written by a 13 year old girl and decide which is which. At the end of the show an opinion by Clarence Thomas could be read to display the sharp contrast of what a real well thought out opinion should look like