The song playing at the beginning of the episode is "It was Only Automation", written and sung by Allan Sherman in 1964. He's most famous for his funny song about camp: "Hello Muddah , Hello Fadduh".
A dark factory, also known as a lights-out factory, is a fully automated facility that operates without human intervention, including heat, light, or other environmental needs
Elon Musk said "Fate loves Irony" which was reiterated by the CEO of the Robotics company played by Owain Yeoman.