Last week, Nielsen reported that streaming had topped broadcast TV in total usage for the first time. Yet both of those media still trail cable TV.  

Every platform still needs content — and plenty of it — which can make for interesting, sometimes ironic relationships.

For example, NBC cancelled its 3-year-old drama “Manifest” recently, just after its first two seasons had debuted on Netflix to become the latter’s most-streamed series. Now, Netflix is reportedly in talks with Warner Bros. TV, the show’s distributor, about producing new episodes.

This should come as no surprise — especially after “Schitt’s Creek,” fueled largely by its success on Netflix rather than by its original U.S. run on cable’s Pop TV, captured nine 2020 Emmys for its final season.

Such jumps from broadcast or cable to streaming echo other moves throughout television’s history.

In the early years, local stations needed to fill their hours, and reruns of filmed network shows provided an ample supply of content. An entire industry of off-network syndication was born.

Fast-forward a few decades, and a burgeoning number of basic cable networks needed to fill their hours, so the off-network syndicators started to worm their shows onto the USAs and TNTs of the new media universe.

Now come the streaming services.

It's arguable that no TV medium has ever needed content more. Streamers don’t have just 24 hours a day to fill, but an infinite amount of time. The more content they offer, the theory goes, the more their subscribers want it.

But let’s not forget those earlier TV media are still out there, and some shows seem to be everywhere.

Take “Seinfeld,” which left Hulu June 24 after six years. It will soon be available on Netflix, which reportedly paid Sony $500 million for the privilege. ut it can also still be seen on local broadcast stations and the TBS cable channel.

And come October, according to a deal in which Sony sold “Seinfeld’s” cable rights to Viacom for somewhere in the not-small-potatoes $45 million range, “Seinfeld” reruns will move to such Viacom cable channels TV Land and Comedy Central.

The only question then remaining will be when Netflix, Viacom and local stations let the aging “Seinfeld” loose to move into what may be the last recycling dump for old shows: those multicast nostalgia channels like Decades and MeTV, which now house once-mighty off-network sitcoms such as “I Love Lucy” and “All in the Family.”

Another one, Nextstar Media’s Rewind TV, which launches in September, will feature shows from the '80s and '90s.

Yada, yada, yada.