Technical reason that 2011 MacBook Air is maxed at 4gb ram I am very interested in the MacBook Air specs and form factor. Both for reasons specific to my software needs (developing using an IDE as well as needing to run a virtual OS on top of the boot OS.) as well as an example of state of the art system design. 

A maximum of 4gb ram is a deal breaker for me. Furthermore from a system architecture stance, this limit feels to me like I am stuck in 2006 with 32bit machines, even if there are not better alternatives in similar form factors. It is like almost there but not quite.

What are the technical reasons that the 2011 macbook air was limited at 4gb ram?
Space, ram is soldered onto the MB. So I see price v optimal RAM amount.