How can companies strike a balance between maintaining a cohesive user interface design across their products and services while also allowing for customization to meet the specific needs and preferences of different user groups?

Companies can strike a balance by establishing core design principles and guidelines that ensure consistency in the overall user interface design. These principles should be flexible enough to accommodate variations for different user groups. User research and feedback can help companies understand the specific needs and preferences of different user groups, allowing them to tailor customization options accordingly. Regular testing and iteration can also help companies refine their design approach to ensure it meets the needs of diverse user groups while maintaining a cohesive overall look and feel.