The graph is scary, but I think it's conflating two things: 1. Newbies asking badly written basic questions, barely allowed to stay, and answered by hungry users trying to farm points, never to be re-read again. This used to be the vast majority of SO questions by number. 2. Experiencied users facing a novel problem, asking questions that will be the primary search result for years to come. It's #1 that's being canib…
We are talking about a site that has accumulated more than three times as many questions as there are articles on Wikipedia. Even though the scope is "programming languages" as compared to "literally anything that is notable".
But there are other places people can go, such as https://software.codidact.com (fd: I am a moderator there).