Serial consoles have been used to communicate with headless networking and datacenter gear for decades. It works without requiring a screen, keyboard or networking which makes it helpful for debugging embedded devices and clusters of broken laptops and headless Arm boxes (which is my home lab). Most devices stopped shipping with serial ports years ago and USB to RS-232 serial adapters became common, but I picked up a USB to USB crossover serial adapter eliminating the need for separate cables. I...