I think this here is probably one of the larger reasons. A large portion of users barely know the difference between a browser and a search engine, let alone the operating system they are using, and nor do they care. People just use whatever their computer comes with out of the box. Most people probably couldn't tell you the difference between Windows 11 and a Linux distro customized to look exactly the same.
I know of a couple Discord servers with "help" channels being used to completely replace forums which would have served the same purpose back in the day. Not sure if that's what it's talking about.