Why does mIRC have file-sharing capabilities?
IRC is about communication. Both chat and file-sharing are a normal part of communication and always have been. IRC has been around since 1988, long before the mass file-sharing systems that we see today came into existence. Although mIRC has a file-server, it is simple and crude, and was designed years ago for basic personal use, to allow individuals to share files with friends, family, and colleagues, and is nothing like the sophisticated and dedicated file-sharing systems in existence today, which are specifically designed to facilitate the sharing of files on a mass scale.