What is a common challenge associated with legacy systems?

Legacy systems are often associated with significant challenges when it comes to integration with modern systems. These older systems typically rely on outdated technology, architecture, and design principles, which may not align well with current technological standards. As organizations adopt newer systems and technologies, they frequently find that these legacy systems are not only difficult to connect with but may also require substantial customization or middleware to facilitate communication. This can lead to increased costs, extended timelines, and complications in data transfer, making it a pressing challenge in modern IT environments.

In contrast, the other options do not accurately reflect the nature of legacy systems. They are not typically up to date, do not generate new coding languages, and often have a higher error rate due to their outdated design and lack of ongoing maintenance. This underscores the considerable hurdles that organizations face when trying to modernize their IT infrastructure while still relying on these legacy systems.