Hi 
The 3.3.x branch was said to have 1 years support.
Keeping up with the very latest release is not feasable for a lot of people. In corporate settings you may want to have a test-sample of users using a new release before rolling it out to all the machines in a company. We have just seen someone that got a ton of hassle over a fairly trivial change. The testing and feedback process is usually a bit of a pain and quite time-consuming so it's not something people really want to go through all that often. Also low bandwith or capped downloads or even no access to internet makes it difficult to keep up.
I really like it that people in rich corporate settings have the same problems as people in rural or desperately poor or 3rd world settings at least in this way.
Regards from
Tom 