Well, the same thing counts for the serial (UART) port. It's incredibly simple, it's a license-free universal I/O port. And in spite of that, it has disappeared

Well, the same thing counts for the serial (UART) port. It's incredibly simple, it's a license-free universal I/O port. And in spite of that, it has disappeared from computers and we now have the complex beast called USB instead. I'm not happy at all about headphone jacks disappearing, but I doubt the development can be stopped.