This is The Stepback , a weekly newsletter breaking down one essential story from the tech world. For more on Hollywood trends and streaming culture, follow Charles Pulliam-Moore . The Stepback arrives in our subscribers’ inboxes at 8AM ET. Opt in for The Stepback here . How it started Once upon a time (read: a few years ago), there were a pair of upstart streaming services called Quibi and Go90 that were supposed to appeal to phone-addicted millennials. These platforms were supposed to compete