I have descended from my ivory tower and read a fiction book that was written in the 2000s…and I had such a fun time doing it! Andy Weir weaves science into his stories so well, and I loved the relationship between Grace and Rocky. Finally, as far as tropes go, humans and aliens trying to teach each other their respective languages is one of my favorites.
I thought the explanation was that the mission was so rushed that the ship and automated systems failed to keep them alive during sleep/stasis.