Believe it or not, muscle memory is one of the first things you forget as soon as you leave Narnia. For example, Lucy learns how to swim in Narnia, but when she goes back to England, she instantly forgets. No muscle memory, nothing, it’s all fresh. The same applies to skills like swordsmanship, archery etc. You won’t remember how to do any of that when you leave, but you will if you come back.
From a storytelling perspective (and arguably Aslan’s perspective), Narnia pulls in people that need to learn a life lesson and are needed for something in Narnia. Aslan doesn’t let you keep everything you gained while there, he only lets you retain information he deems important to your life on Earth… Because despite being literally Jesus, Aslan is a bit of a dickhead sometimes.








Elon Musk immigrated from South Africa to the US, so I can think of at least one thing that made things distinctly worse in the US at least.