Here's a neutral and interesting summary of the text in one paragraph: MongoDB successfully integrated ClangFormat into their codebase, initially overcoming challenges such as rescuing stranded changes after a reformat commit, holding the line during daily development, enforcing code formatting before check-ins, reviewing code for formatting consistency, and managing tool versioning to ensure compatibility. The integration has resulted in better coding practices, reduced costs associated with writing and reviewing code, and improved productivity among developers, ultimately paying off in the long term despite initial integration expenses.