4chan was born of a banned SA user.

This is a great interview[1] about Something Awful featuring creator Rich "Lowtax" Kyanka. The Something Awful forums had a board called Fuck You and Die, which was a predecessor to 4chan's /b/. YTMND's lineage to SA is acknowledged here as well.

If you used to post on the SA forums, you'll probably get a load of nostalgia hearing this again[2]

(this was the background music of the board where deleted threads went to die)

[1] https://www.vice.com/en_us/article/nzg4yw/fuck-you-and-die-a...

[2] https://youtu.be/9_NqFgYJWn8?t=204

moot stopped posting at SA many years ago, but he isn't banned. https://forums.somethingawful.com/member.php?action=getinfo&... is him.

4chan started on one of the ytmnd test servers. I might still have a screenshot of that somewhere.

4chan was largely populated by SA users and anime nerds in it's earliest days.

Even if it doesn't (and it does, see in same chain), it almost certainly is the progenitor of the prevailing culture found on 4chan. Maybe not the current trend as of recent, but definitely at it's peak.