Palatal plate major connectors provide a broad and thin metal coverage across the palate, which distributes occlusal forces evenly. This thin metal design ensures minimal interference with tongue movement and comfort during speech and mastication. Additionally, the rigidity of the metal plate enhances the strength and stability of the removable partial denture. Their thinness allows for better adaptation to the palatal tissue without causing bulkiness, improving patient acceptance. Therefore, the main advantage lies in their thin metal plate structure that balances strength and comfort effectively.

Reference: Stewart's Clinical Removable Partial Prosthodontics, Stewart, 4th Edition.