I have noticed that many modern motherboards still have PS/2 connectors, despite that connector being outdated. Why is this? USB offers faster data transmission than does PS/2 and is has plug-and-play functionality, which PS/2 does not. I know that PS/2 connectors are used for mice or keyboards, but most mice and keyboards use USB as their primary connector today, and since most motherboards have as many as eight or ten USB ports (with the ability to add more via the use of add-on cards or front panels of the case), I cannot imagine that using two USB ports for the mouse and keyboard would lead to a shortage of USB ports.
What does everyone else have to say on this subject? Why do modern motherboards still have PS/2 ports?