Use a simple decision process:
- Purpose: Identify the visitor or business goal the feature supports.
- Evidence: Check analytics, conversion behavior, feedback, or testing for signs that it helps.
- Usability: Confirm that it works clearly and accessibly across devices.
- Performance: Compare its value with the speed or distraction it adds.
- Maintenance: Consider the time, cost, and risk required to keep it working.
Keep it when the value is clear, change it when the idea is useful but the execution creates friction, and remove it when the cost outweighs the evidence.