Why have flaps on planes got smaller?

Flaps on planes have become smaller primarily due to advancements in aerodynamics and materials technology, which allow for more efficient wing designs. Modern aircraft benefit from high-lift devices and wing shapes that generate sufficient lift without the need for large flaps. Additionally, smaller flaps contribute to reduced drag during cruise, enhancing fuel efficiency and performance. These changes reflect a broader trend towards optimizing aircraft design for operational efficiency and environmental sustainability.