It's true: Stack Overflow has changed. It's not bad (yet?), but it is different. The discussion on the linked page focuses a lot on bad questions, and there are plenty. But it's also much, much harder to ask good questions. To some extent the site is a victim of its own success: whereas I used to ask a basic question [1] and get several up-votes and a good answer, now I ask a basic question [2] and get almost as many down-votes as up-votes, plus the answers themselves get as many down-votes as up-votes, including some answers I actually liked but the community decided were so bad they couldn't just leave them at 0, they had to push them down to -1 and into the leper colony.
Tons of comments and answers insist I had an XY problem [3] when I did not.
Some of it is because "The good questions have all been asked and answered," and some of it is that the legitimate complaints about absurdly low-quality questions have gotten people into such a mood that a so-so question from a veteran user makes them spend their own reputation to down-vote each others' answers.
Stack Overflow has an XY problem: the real problem is that a lot of questions are just bad because the barrier to entry has remained too low for too long, but it thinks the problem is the XY problem.
Some of it is because "The good questions have all been asked and answered," and some of it is that the legitimate complaints about absurdly low-quality questions have gotten people into such a mood that a so-so question from a veteran user makes them spend their own reputation to down-vote each others' answers.
Stack Overflow has an XY problem: the real problem is that a lot of questions are just bad because the barrier to entry has remained too low for too long, but it thinks the problem is the XY problem.
[1] http://stackoverflow.com/q/148951/
[2] http://stackoverflow.com/q/22856977/
[3] http://mywiki.wooledge.org/XyProblem