Various metrics illustrate the dwindling popularity of news content.

Cable news networks were the main form of evening entertainment for millions of Americans last year. In 2021, weekday prime-time viewership dropped 38% at CNN, 34% at Fox News Channel and 25% at MSNBC, according to the Nielsen company.

The decline was less steep but still significant at broadcast television evening newscasts: 12% at ABC's "World News Tonight" and the "CBS Evening News;" 14% at NBC's "Nightly News," Nielsen said.

The Trump era saw explosive subscriber growth for some digital news sites like The New York Times and Washington Post. Yet readers aren't spending as much time there; Comscore said the number of unique visitors to the Post's site was down 44% in November compared to November 2020, and down 34% at the Times.

While a Dec. 23 headline on the Los Angeles Times front page — "How Much More Can We Take?" — referred to COVID-19, it could easily be applied to the news appetite in general.

For the most part, smart news executives knew the peaks of 2020 were not sustainable.

"It was entirely predictable," said news media analyst Ken Doctor.

Perhaps that was most obvious at the cable news networks. They built a prime-time model almost entirely focused on political combat during the Trump years, which made it difficult for them to pivot to something different, said Tom Rosenstiel, a journalism professor at the University of Maryland.

"You become, to some extent, a prisoner of the audience you built," Rosenstiel said.

Those networks remain focused on politics even as viewership interest wanes. The media monitoring company NewsWhip looked at 14 million political articles online last year and found they had an average of 924 engagements, or social media interactions. The 13.5 million articles NewsWhip has traced in 2021 had an average of 321 engagements.