Reddit and HN aren't forums, they're factories for quick takes and reactions (and yes this is one of them). It's a transitory experience.

The good old "crappy" forum format isn't gamified with upvotes and often have long-running, slow-burn threads that go on for months or years. Even once popular, high-traffic forums such as SomethingAwful had a different pacing and community feel to them. It's like a pub with its locals and regulars, but where new faces sometimes pop in.

With that said, there are still plenty of "crappy" forums around, typically at least one for every special interest or hobby imaginable.