I've always ben wondering what the point of probes/rovers are. (other than getting a good look at the planet/moon) Are they good in sience/carrer mode? Are they worth the effort and money to put on planets/moons? I do have SOME guesses, but anything other than these, i simply cant find a use...
1. Transferring Stranded kerbals to bases: say if you have TAC Life support and a kerbal is stranded on Duna, Laythe, etc. so you need to send the kerbal to a base to stay there till help arrives.
2. Refueling Ships: By using a rover with a drill-o-matic and a convertotron, they could dock to a lander with no fuel, and fuel it up again. (with the advanced grabbing unit, as i highly doubt that you build your landers with docking ports specifically for rovers )
Other than these 3 uses (which i'll most likely never take advantage of) i can't find a use for them.