When did monoculture die?

I feel like monoculture never died. If anything 2003-early 2004 feels like the last true monoculture where radio, tv, visiting libraries for information, old school mtv, ads and blockbuster films were still dictating large aspects of pop culture without the internet being a central part. It was still internet 1.0 where common content and searchable info wasn’t as reliable or super rich or as much of central part of pop culture, as opposed to how the internet  influenced the mainstream around 2005.

2004-2005 feels a lot more internet influenced, with Wikipedia and early social media peaking and slowly changing/influences traditional media structure with decentralizing more information while also bringing a new wave of internet driven subcultures like emo, indie to the mainstream but not as much as 2005-2007.

2007-2012 is probably the last time where cable tv, radio common, big films and rigid fashion had some degree of a stricter monoculture had a more tightly defined aspect to it but it was clearly transitional. 2011-2012 could be the last gasp of it, even though 2008 started to move away from monoculture.

The again you could argue that all of 2010s were a mono culture depending how you look at it.

If you mean traditional media.

I would say around gradually between 1999-2015. And a bit less in 2020 to the present. 1998 was practically old school with mp3s catching on a bit more in 1997-1998 but not enough music ripped online and no major file sharing yet.

There was a reduction felt in 2001 (cds no longer necessary, dvd burners and file sharing boom), 2005(iPods/iTunes boom peak second phase of reducing the need for cds) , 09-2010 (e book readers and iPads lay the foundation) and 2013-2014(Netflix) and 2020-2021( reduction of physical movie media in general).

On the otherhand, the 2010s also brought back vinyls to the mainstream and a lot of emphasis on physical media like Blu-rays, collecting cds and tapes etc and ironically there wasn’t that much of a focus in the 2000s with physical media deemed unnecessary beyond occasionally purchasing cds once and a while and collecting dvds if you couldn’t bootleg or torrent them.

I'd say monoculture died sometime around 2016, around the time memes went from universally understandable to the weird, several-niches we have today.

Dunno what caused it but i guess i blame social media and streaming

And it's funny he mentioned comic book movies, as if those weren't a thing in the 70s, 80s and 90s

No way lol. Back in the early 10s popular music was actually popular, if a song was big, you'd hear everywhere. Everyone knew who people like Lady Gaga, Katy Perry and Justin Bieber were.

Tv shows were huge too, TWD and GOT being the two big examples, but even more "cult" series like breaking bad were big.

Same with cartoons like Adventure Time.

Nowadays, big hits are rare, popstars just aren't that inescapable anymore, same with cartoons and tv shows (and other stuff).

Movies are still monocultural tho

Superman came out in 1978, and it popularized superhero movies to begin with. It was also the highest-grossing movie of 1978.
Superhero movies themselves have changed since 2006. There was no concept of cinematic universes, and superhero movies were still thought of as dumb action-y fluff, a rep that would shift after the release of the massively successful The Dark Knight in 2008.

it didn’t. monoculture is still alive today in the early 20s

examples:
- euphoria
- squid game
- tiger king
- tiktok (you can quote certain tiktoks in public and get tons of reactions from people around you)
- wireless earbuds
- covid (yes, it’s a monoculture)
- Movies like Spider-Man: No Way Home or The Batman

It's very weak though. I mean monoculture can never truly die technically but it's so weak you can say in a general sense it's dead. Go check the views on music videos on youtube compare the views on late 10s songs to early 20s. The most popular song in the early 20s gets as many views as a random average song in 2019. Also those are like the only big movies this decade. 2019 alone had 3x as many mega hits than each year of the 20s combined. 

TPopular stuff in the late 10s was far more popular than in the early 20s. I don't even know what tiger king and euphoria is.