The original Agile poster child, Chrysler Comprehensive Compensation System (C3) was never very successful as a project. It achieved only a fraction of its goal

The original Agile poster child, Chrysler Comprehensive Compensation System (C3) was never very successful as a project. It achieved only a fraction of its goals and was ultimately cancelled. YAGNI in that context is hilarious, because they were replacing an existing COBOL based payroll system. They literally needed pretty much everything the old system did to be successful. Part of the failure is because the devs did not understand what they were replacing.