Question: Would it be possible to run StackOverflow without ASP.NET sessions?

Answer: 
The use of session was discussed in the [last podcast](https://blog.stackoverflow.com/2009/07/podcast-63/), in the context of adding more servers. IIRC, the summary is "session is used but not a lot and could probably be removed if desired". But in Jeff's words ;-p
I've noticed that stackoverflow doesn't use asp.net session cookie anymore , does it mean it doesn't use session anymore ?