There was plenty of "long form content" being produced for hundreds of years before the invention of social media. We called them books.
I think long form content will be fine.
I think long form content will be fine.
Essays, short stories, deep investigative news stories, etc. also all fall into the "long form" bucket. A lot of those had their natural homes in magazines and newspapers, and those have taken huge hits as people's attention has turned to short, viral, online things instead.