What common mistake do developers make with Route groups and prefixes, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with Route groups and prefixes, why does the mistake cause problems, and what is the safer approach? One recurring problem with route groups and prefixes is applying it without understanding the boundary it protects. Changing a route URL and then updating dozens of hard-coded links when a stable named route could have isolated the change. In addition, Groups can automatically apply name prefixes to related routes. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.