PowerShell Best Practices are constantly evolving, adapting to changes in the language and tools. These practices serve as a solid foundation for writing, thinking, and designing in PowerShell, making it less likely to encounter issues. While there are exceptions to these best practices and style rules, they provide a baseline for code structure, command design, programming, formatting, and style. Following these guidelines helps avoid common problems and ensures your code is reusable and readable—reusable code doesn't need rewriting, and readable code is easier to maintain.
Remember, the Scripting Style and Best Practices Guide are recommendations, not rigid rules. If you're struggling to follow a style or best practice and it's hindering your progress, you've missed the point. This document is meant to be pragmatic, not dogmatic.