In what situations is reusing the same code not recommended?

Reusing the same code is not recommended in the following situations:

• When the code needs to behave differently in different contexts. In such cases, it is better to use parameterization or polymorphism to avoid hard copy-pasting.
• If the repeated code contains bugs or vulnerabilities. Copying problematic code spreads errors.
• When reusability worsens readability and maintainability. Sometimes duplicating small fragments is simpler and clearer than creating complex abstractions.
• If the code depends on environment specifics or state. In such cases, it is better to create separate modules or functions with clearly defined interfaces.

In Node.js, it is important to balance between DRY (Don't Repeat Yourself) and code clarity to maintain quality and ease of project support.