Twilight Sparkle has walked the wastelands for a very long time, but now, at last, he has reached the end of his journey. He only hopes now that the gods will listen to his prayers, and finally allow him a good place to die.
Princess Celestia, in her infinite wisdom, comes to the conclusion that she doesn't have nearly enough time to do everything on her busy schedule. Not a problem for her, though. The solution to having no time is obvious: just make some more.
When Bon-Bon has to leave Ponyville for a while to visit her family in Manehattan, Lyra writes her letters every day. And every day, she gets a letter back. What could possibly be wrong with such loving devotion?
I have heard ponies say that living so long would be a curse. That it is a burden. That it can break a pony's mind. There is some truth to that, but it's not the whole truth.