User blog comment:Fimber/Crazy things that would make sense... or so.../@comment-5674726-20131215213332

But why would Kilgharrah want a future without magic when regarding the final scene with Merlin wandering the streets in our modern world?

Perhaps he no longer had an interest in the fate of magic. He was the last of his kind, and would die of natural causes a decade or so later - a very short span for a being as old as he was. Even after Aithusa was hatched, there could be no question of the race of dragons continuing as (a) Aithusa was male, and (b) even if Aithusa was female, Kilgharrah wasn't going to live long enough for her to be mature enough to make baby dragons with him. After he died, it was only a matter of time before Aithusa also died and with him/her, their race.

If the magic of the dragons was to die out, perhaps Kilgharrah simply didn't care what became of other forms of magic.