Halfway through the run came the sort of problem that lived for realism: a hotbox detector pinged at Mile 72. Marcus slowed, craning his digital neck to examine the consist. The community patch had added a faithful HUD—temperature readouts, journal entries, and a chat overlay where other players pinged advice in short, efficient bursts. "Coupling temp rise? Stop and inspect," someone wrote. He thumbed the radio and called the dispatcher in the simulator’s layered audio. The voice was calm, a stranger with the practiced patience of someone who’d rerouted whole freightflows in the time it took Marcus to hook up his air lines.