In the not-so-distant past, TV viewers were forced to wait a week for the next installment of their favorite shows, parceled out by networks in half-hour or hour-long increments.

Fast forward to 2019, when media and tech companies are subverting that schedule and the majority of viewers using U.S. TV streaming services watch an average of four hours of content in one sitting, according to Deloitte.

To understand how we got here, look at Netflix.