Podcast have a slot of their own but won’t replace radio for it has more listeners tuned in.
Marketplace (Financial news, neutral), 14.8 million
All Things Considered (Newsmagazine, leftist), 14.7 million
The Sean Hannity Show (Talk, right of center): 14.5 million
The Dave Ramsey Show (Financial talk, neutral), 14 million
Morning Edition (Newsmagazine, leftist), 13.1 million
The Mark Levin Show (Talk, conservative), 12 million
Coast to Coast AM (Paranormal talk, neutral) 11 million
The Glenn Beck Program (Talk, conservative), 10 million
The Mike Gallagher Show (Talk, right of center) 8.5 million
Delilah (Adult contemporary music, neutral) 8.3 million
The talkers have their place, but radio is on a long-term decline. You can just as easily listen to a podcast. Cable news is another dying medium. CNN may still have a near-monopoly on airport TV screens, but most people are reading their smartphones and ignoring the screens.