Advanced palliative care- is it ethical?

I'm not sure how I feel about this. There were a few times over the last year my Grandpa was alive (this past year) that medical intervention was the only thing that kept him alive but between those times, we still had some good memory making and his last 48 hours were drawn out but it gave our whole family a chance to be together with him one last time. On the other hand, he was so weak and out of it whereas a year beforehand, he was so amazingly spry and would've "died with his boots on" so to speak.