[ampdepolymerase]

Probably the usual aerospace stack: C/C++ and Ada doing the heavy lifting. Since memory is no longer a (significant) space constraint in 2021, I suspect other high level languages are also used for the non-critical parts of the system.

[harveywi]

> memory is no longer a (significant) space constraint

I see what you did there.

[sul_tasto]

the universe is expanding, after all...

[virgil_disgr4ce]

> Since memory is no longer a (significant) space constraint in 2021

Is this definitely true in the context of astronautics?

[bootloop]

The main computer of Perseverance (and Curiosity) has 256 megabytes of RAM. Which is only twice of what Spirit and Opportunity had so I wouldn't call this a significant increase. (Even Pathfinder had 128 in 1997 but wasn't a rover.)