I’m not sure it is the age or getting old, or just the type of brain. I’ve always was more attentive to people who spoke faster from keeping my mind wandering during the conversation. I was always told to slow down my speech throughout school.
For me its the quickness of the dialogue. And since it is animation they are not held back by grand scale budgets for every little detail of a new planet or giant space ship battles. Again this is my take. And it took me a minute to appreciate LD.