However, the consequence of this is that the castle is uncomfortable to live in. The supply of various materials will be relatively difficult, and the castles at that time were generally dirty and damp, and there was no artistic decoration or the like.
The castles in medieval Europe were not as beautiful and charming as the later Swan Castle, because Swan Castle was actually a villa rather than a castle in the military sense. Just because of the consistent traditions and habits, Europeans will later build villas and castles on mountains or lakes for holidays and so on.
Therefore, the castle built on the mountain in the early days was a military consideration, and then there was no military consideration. Building on a mountain is a continuation of tradition, culture and habits.