The change has come on quickly. According to FX, there were 24 series from so-called online services in 2013. That same year, there were 131 series from the broadcast networks and 161 basic cable shows. Five years later, in 2018, the streaming platforms accounted for 160 series, more than the number of shows made by the networks (146) or basic cable (144).

For 2019, FX did not distinguish between streaming and cable — John Landgraf, the FX chairman, has argued that measure was antiquated — but online services are now the dominant players in television.

In 2015, Mr. Landgraf argued there was “simply too much television” and coined the term “Peak TV.” He predicted that an inevitable decline was likely to set in soon. Instead, the growth has seemed endless.

And it is not just the streaming services. Even the old guard made more shows last year.

HBO had so much programming in 2019 that, for the first time, first-episode runs of some of its series spilled into Monday, rather than the channel’s traditional Sunday night slot that was once home to “The Sopranos” and “Sex and the City.” Last year, the network said it planned to air 150 hours of original scripted content, a 50 percent increase from 2018. In May, it will fully commit to streaming, with the unveiling of a new platform, HBO Max.

There is now so much TV that even the people who watch it for a living have had a hard time keeping up. “The idea that you could cover it all is gone,” said Willa Paskin, a television critic for Slate.

Matt Roush, a senior critic for TV Guide Magazine, pointed out a seemingly innocuous upcoming day on the calendar: “February 6, a Thursday, there are six major series premiering,” he said. “A network sitcom, a network drama with Edie Falco, a big USA Network project, plus another season of ‘The Sinner’ with Matt Bomer in it. There’s a CW show. And this ‘Interrogation’ thing on CBS All Access.”

Netflix and Apple have major releases planned for Feb. 7 — “Locke & Key” for Netflix; “Mythic Quest,” a live-action comedy for Apple.