I don't see how they could.
Between the dust on their solar panels and their moving parts wearing out, I don’t see how they could last that long.
Compared to the MER’s, Ulysses is in a very clean environment. And it doesn’t have its parts wearing out from wear on the same scale as the MERs.
I am surprised the MER’s have lasted this long. And I am still rooting for them. I hope they have a couple of more years in them.
