후행이 아닌 구분자는 즐겁지 않다

JSON's prohibition on trailing commas forces developers to modify multiple lines when adding or removing the final element, reducing code maintainability and cluttering version control diffs. Languages like Python, Go, and especially Alloy have adopted more flexible delimiter rules that simplify refactoring and collaborative development. This analysis reveals how small syntax design choices significantly impact developer experience and code maintenance workflows.