I hope the afterlife has oceans. https://www.theguardian.com/tv-and-radio/2019/oct/13/stephen-moore-obituary
Lets hope the afterlife isnt eternal for his sake. “The first ten million years were the worst," said Marvin, "and the second ten million years, they were the worst too. The third ten million years I didn't enjoy at all. After that I went into a bit of a decline.”
If you liked THGTTG and some of its explorations on philosophy you can find similar robots in the story by the great Stanislaw Lem in The Sanatorium Of Dr.Vliperdius. Marvin would be one of it's permanent in patients.