Pour out a box of sugar cereal to honor the death of an American institution.

The TV landscape is certainly changing. There are hardly any soap operas left, most any program can be seen outside of its timeslot online the next day, and cheap devices allow us to store our favorite shows and skip the commercials. But while the majority of viewers do still watch, say, late night TV shows late at night, there’s one TV institution that’s gone for good: Saturday morning cartoons on network TV.

Last weekend, the CW aired its “Vortexx” block of action-heavy cartoons for the last time—the last time a broadcast network aired cartoons on Saturday morning. Next weekend, in that place will be a block of live action shows. Since 2013, CBS has aired a block of live-action educational shows for kids produced by a company called Litton Entertainment…which has provided similar shows for ABC’s Saturday mornings since 2011. Fox stopped airing Saturday morning cartoons in 2008 and left the responsibility of filling Saturday morning up to its affiliates. NBC did away with cartoons all the way back in 1992, filling the morning with another edition of Today and a block of sitcoms geared toward teens, including Saved By the Bell.

So what exactly killed the Saturday morning cartoon? Again, the changing TV landscape.

• A series of laws passed in the 1990s highly regulated children’s programming on the broadcast channels. Networks are required to air three hours weekly of educational shows, and they generally put them on Saturday morning, displacing cartoons.

• Cereal and fast food companies have been under increasing pressure to curtail marketing to children, as those products have been linked with the rise of childhood obesity. The biggest advertisers on Saturday mornings, in their heyday? Cereal and fast food.

• The audiences just kept dwindling. Up to the 1980s, there was very little kid-oriented TV available. If kids wanted to see cartoons, they had to wait for Saturday morning. Today, the majority of American homes have cable TV, which offers multiple channels just for kids, such as the Disney Channel, Nickelodeon, and Cartoon Network. Kids can now watch cartoons whenever they want.