The Weather app in Windows 11 can consume over 1GB of RAM, raising concerns about performance and user experience. Microsoft is aware of the need for performance enhancements, particularly for devices with limited RAM, as many manufacturers are reverting to 8GB laptops. The app's memory usage and inclusion of advertisements contribute to user frustration, with complaints similar to those from Windows 10. Users express discontent over ads in native apps, questioning the value of a paid operating system. Microsoft has committed to reducing upselling in Windows 11, and addressing the Weather app's issues could improve user satisfaction.