Hats off to the team who made this work with the available power budget, considering the spacecraft was not really designed to go out that far away from the sun.

Both Rosetta and Philae would have been an excellent use case for nuclear batteries, which would have allowed the lander to send data back for decades. Granted, most of the science data can probably be gathered within the window we have now, but it would have been nice to have a longer-term sensor up there.