This article discusses the reasons why movies don't always start at their stated showtime. It points out that movie theaters are often selling tickets for multiple screenings, which makes it difficult to start one movie on time before the other has finished. It also explains that movie theaters need time to clean up between screenings and reset the theater, as well as account for latecomers. Additionally, the article mentions that movie theaters want to make sure to maximize their profits and fill every seat, so they may hold the start of the movie until the theater is full. Finally, the article states that movie theaters also have to account for technical difficulties that may arise and need time to fix them before the movie can start.