PS/2 is actually the better interface since it's interrupt-based. USB is polling-based, hence the latency issue. A lot of non-Apple laptops still use it for the

PS/2 is actually the better interface since it's interrupt-based. USB is polling-based, hence the latency issue. A lot of non-Apple laptops still use it for their internal keyboards and mice due to interrupts using less power. As with the headsets, it boils down to the right tool for the job, for sure. I refuse to buy a phone without a 3.5mm jack because I know that it'll work with any possible headphone or speaker combination I could possibly encounter.