Tons. There still exists some holdouts with long histories (such as anandtech). That said, once upon a time nearly all "social media" was forums for things of interest.

It sort of makes me sad for the internet bygone. I really miss the fact that nearly every product had a half dozen fan pages dedicated to it. Things like https://www.massassi.net/ were amazing back in their hayday. Now everything it consolidated into big social media locations :(

That's one positive of projects like Posthaven