Now that in Berlin real estate companies are already advertising a financially strong lifestyle of the 1920s on scaffolded facades in the typography of "Babylon Berlin".
Now that the fourth season of the successful German series has started and has been noticed by almost everyone, at least in passing.
Now that the Golden Twenties seem to be officially in the picture, with a neatly dressed Max Raabe in front of the stand microphone - "Greetings to Moscow, Paris and to Vienna / We wave to you: Everything is coming to Berlin".
Now it's worth looking back at another series that covers roughly the same period but shows a completely different 1920s.
Set in prohibition-era Atlantic City, "Boardwalk Empire" follows organized crime using the ban on alcohol to generate excellent business.
Grimacing pimps
Starring as the thoroughly corrupt City Treasurer "Nucky": the unmistakable Steve Buscemi.
As his unfaithful right hand: Michael Pitt.
And in addition to a multitude of other violent gangsters, grimacing pimps and smugglers in loden coats, a very young thug named Al Capone also appears here.
At the beginning of the series he is still working as a bodyguard for a local gang leader, but then he quickly works his way up to become the influential boss of organized crime in Chicago.
The time that "Boardwalk Empire" shows is only remotely related to the one that shows "Babylon Berlin" via the trumpet rhythms of dance music - otherwise they are almost opposite worlds.
Where politics becomes criminal on one side of the Atlantic, criminals become political on the other, and former alcohol barons rise to become the politically influential personalities of the United States.
The way they soon step into hotel lobbies or stroll along the beach promenade ($18 million, set up as a backdrop) still provokes viewers today with their confident self-evidence.
No loden coats
"Nobody can do anything to us," says each gang, "you need us, so be quiet," means every gesture.
And if you switch to the news these days and see a report on the start of the soccer World Cup, you suddenly have a déjà vu, then you suddenly think you see the same gangsters as at Scorsese: only that they are here in with complete peace of mind, still in the middle of a home game, running up the stairs of a stadium and wearing persil-white innocent robes instead of loden coats.