“The power from the solar arrays is not sufficient, on its own, to drill and analyse cometary samples, for example.”
Its clear that power is an issue and an RTG would have solved it. These don't sound like "bonuses" to me.
"And eventually, Philae will hopefully get sufficient power in its battery to drill into the comet and analyse its make-up."
Although claiming it was never a failure is pretty laughable.
“The power from the solar arrays is not sufficient, on its own, to drill and analyse cometary samples, for example.”
Its clear that power is an issue and an RTG would have solved it. These don't sound like "bonuses" to me.