The post discusses the development of Mbed-TLS, a lightweight implementation of the TLS/SSL protocols, for the Classic Macintosh operating systems (OS 7, 8, and 9). Comments reveal that there is ongoing interest in maintaining compatibility with older C standards (C89 and C99) to facilitate porting efforts. Users express enthusiasm about the potential revival of older software applications like Classilla, a web browser that faced SSL/TLS compatibility issues. The conversation also touches upon the challenges and tools involved in porting such libraries to legacy systems, indicating a small but passionate community around classic computing. Key themes include preservation of legacy software, the technical hurdles of software maintenance on outdated platforms, and the potential for modern security protocols to breathe new life into classic applications.