Over the past one and a half years, Stack Overflow has lost around 50% of its traffic. This decline is similarly reflected in site usage, with approximately a 50% decrease in the number of questions and answers, as well as the number of votes these posts receive.
The charts below show the usage represented by a moving average of 49 days.
What happened?
A few months ago I had a 7 year old question of mine closed as a duplicate of a 5 year old question. Just another sign that StackOverflow mods are hard at work.