> The Views Count chart reveals an even clearer trend of constant decline starting in 2013, highlighting significant issues with the model StackOverflow operated under. This is the raw data used for this observation.
This seems to be wrong. According to the graph StackOverflow has nearly no views at all, which can't be right. The link goes to a query that selects votes not views, and does indeed show an enormous decline. But it's possible that people still view the site, they just don't vote.