That beautiful, symbiotic relationship worked when they were both young, outcast, and fighting a war. But by the third film, they had grown up. Hiccup becomes chief, marries Astrid, and learns to stand on his own two feet—prosthetic and all. Toothless learns to fly without Hiccup’s manual control (the auto-tail was a genius storytelling device).

Their separation isn't a failure of friendship. It’s the ultimate graduation. They no longer need each other to survive—they simply love each other enough to let go. Grimmel the Grisly represented a harsh truth: as long as dragons lived near humans, there would always be warlords, trappers, and killers hunting them. Berk was no longer safe. The Hidden World—a massive, beautiful, dragon-only ecosystem—was the one place dragons could truly be free.

Absolutely. I’ll never listen to "For the Dancing and the Dreaming" without tearing up.