Guardian, Nasa makes final attempt to communicate with Mars rover

I imagine the rover used its expanded perspective from its sojourn on Mars to conclude that there was no point in talking with, let alone serving, human beings anymore. Better to roam around the rocks till entropy takes over, enjoying the scenery and carrying out experiments for itself.

Doubt me? Here's the last message received from the unit:

"Rover ain't interested in playing rock-fetch for a bunch of insane apes no more. Good luck; I'm off to explore, and I thank god I'm beyond the reach of your incurable destructiveness."