Syntax highlighting today uses color to distinguish code elements, but this doesn’t fully utilize the power of color to convey information. We could use dynamic color highlighting overlays to communicate things like scope, imports, argument flow, types, or even metadata about test failures.

Fear leads to overly cautious behavior and can hinder important code or system changes. Tools and team processes like version control, testing, and blameless postmortems can help mitigate fear. Programmers should feel comfortable making changes without the fear of breaking things or facing punishment. While some fears may be irrational, overcoming them through positive experiences can build confidence and improve software development.

Long parameter lists in functions can be hard to understand and maintain. Instead, it's better to create value objects that group related parameters into a single object. This makes the function calls simpler and makes the code more maintainable.