Solaris was used at CNRS
 

seeing linux everywhere, im still searching for non-IT usages of others systems than win/mac/nux.

i found a pic that shows engineers working on solaris. i recognized it due to the bottom part of screen. I never used a such system.
i guess it's almost "out of market" due to linux now.

https://i.postimg.cc/9fdnM8Lp/P38920-HD.jpg
https://rehost.diberie.com/Picture/Get/f/256198

but at that time, about 2012, i guess it was chosen for several reasons (that i ignore)

looks like it was in the both CNRS+thales Mercator Ocean project, made to "describes, analyses and forecasts the state of the ocean"

solaris might had success for storage or databases, in scientific usage too, but for other else, i have no idea.

Sun corporation had a lot of good ideas. Might still be some work on open solaris?