He had spent quite some time absorbed in his thoughts regarding the esoteric scientific data that Julian had given him. While Julian did go through some effort in contextualizing the scientific jargon of this world to help Rui understand, it was still an immense amount of data. Even if he stored it in his Mind Palace, that merely got rid of the need to constantly access the documents.
Though, with his sophisticated application of the Mind Palace technique, there were definitely plenty more advantages. Martial Art techniques theoretically usually didn't have an absolute upper limit to proficiency and degree of mastery, and the Mind Palace definitely fell into the category.
Of the few Martial Artists that had completely mastered it, their application of it was limited to simple and straightforward storage, and nothing more.