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?
No, they shouldn’t be archived. I say that because technology can change. At some point they added a new sort method which favors more recent upvotes and it helps more recent answers show above old ones with more votes. This can happen on very old posts where everyone else might not use the site anymore. We shouldn’t expect the original asker to switch the accepted answer potentially years down the line.
There’s plenty of things wrong with SE and their community but I don’t think this is one that needs to change.