One of the primary reasons COBOL remains relevant is its ability to handle large-scale data processing. COBOL's robust design and efficient data handling capabilities make it an ideal choice for processing and managing massive amounts of data. Many legacy systems, which are still in use today, were built using COBOL, and these systems continue to play a critical role in various industries. For instance, many banks and financial institutions still rely on COBOL-based systems to process transactions and manage accounts.