Basically, radio hasn't changed over the years.

1990s
From January 1989 to March 1998 when Kasem was not at the helm of AT40 he was host of Casey's Top 40 Casey's Hot 20 and Casey's Countdown syndicated by the Westwood One Radio Networks. Kasem also made two cameo appearances on the TV show Saved by the Bell in the early 1990s and one cameo appearance on the 1970s show Quincy M. Additionally he appeared on camera as a co-host of Jerry Lewis' annual Labor Day Telethon for The Muscular Dystrophy Association from 1983–2005.

Since early 2012 Casey has been broadcasting American Top 40 shows from the 1970s on Smooth Radio in the UK. After 40 years Casey retired from his role of voicing Shaggy in 2009 instead voicing Shaggy's father in the 2010 TV series Scooby-Doo! Mystery Incorporated. Currently Kasem is heard on Premiere Radio Networks' weekly syndicated radio programs based on the American Top 40 franchise: Casey Kasem's American Top 40: The '70s and Casey Kasem's American Top 40: The '80s are replays of AT40 shows from the respective decades.