Dude decided to completely ignore how hostile SO became in the last years, because obviously it is AI and not "DUPLICATE", "RTFM", -100 downvotes for asking "simple" question, questions unanswered for decades, etc.

The funniest part is that from the image itself you can clearly, unambiguously see that the downfall started between 2020~2022. ChatGPT was launched in Nov 2022. So the downfall of SO couldn't be caused by AI, at least not initially. But the blog post author is so biased that they simply ignored the image they posted themselves.