I think it's pretty common that ingroups can say whatever they'd like. Outgroups saying the same thing, however, takes on any entirely different color.
Anyways, 4chan was seminal to the internet as you know it. The Portal developers debuted Narbacular Drop, it was foundational to early streaming e.g. "let's plays" which are echoed by several major platforms to this day (Justin.tv) it isn't verifiable by any means but I recall someone either posing as the YouTube developers, or the actual developers themselves promoting the earliest iterations of YouTube - early enough that I was wholly skeptical of the viability of the platform. I'm reasonably sure that Stranger Things was written by a creepyposter, or ripped off by the writing crew. A lot of the meme syndromes were pioneered there or at least allowed to proliferate. It's frankly ridiculous and highly biased to color it in broad strokes.
4chan circa 2004-2013 is very much not 4chan in 2023.
The site does not influence as much as it is influenced at this stage, you see memes cooked up on telegram and twitter which then filter back to 4chan, this backflow would've been unthinkable before — 4chan was faster, it was first. It is no longer that.
I don't browse 4chan anymore, not regularly, but they're still streamlined in some categories. They're still very gung-ho and high seas from what I've seen. I don't think 4chan has the cultural edge it once did, but I still think the community tends to be on the cutting edge just due to the anonymity, ephemerality, and the fact the site has always sat hard on being edgy. But maybe I'm wrong, I'm hardly a cultural analyst.
I guess I'd point to Automatic1111 (4channer) as my most recent high-profile exposure to something 4chan related. And Automatic1111's repo was the favored client, and one of the most rapidly developed programs I've ever seen.
Anyways, 4chan was seminal to the internet as you know it. The Portal developers debuted Narbacular Drop, it was foundational to early streaming e.g. "let's plays" which are echoed by several major platforms to this day (Justin.tv) it isn't verifiable by any means but I recall someone either posing as the YouTube developers, or the actual developers themselves promoting the earliest iterations of YouTube - early enough that I was wholly skeptical of the viability of the platform. I'm reasonably sure that Stranger Things was written by a creepyposter, or ripped off by the writing crew. A lot of the meme syndromes were pioneered there or at least allowed to proliferate. It's frankly ridiculous and highly biased to color it in broad strokes.