OS that runs the Mars Rovers and Artemis is helping power the Roman Telescope

VxWorks has been around forever, and while Linux likely leads in raw unit count now due to massive constellations like Starlink, an incredible number of legacy deep-space missions are still chugging along!

I heard Curiosity only has 1% of the availble memory on-board and it's still doing science. Memory mapping and not requiring an MMU probably helps with that.

https://spectrum.ieee.org/curiosity-rover-jpl-mars-science