Board Thread:S,R,&G/@comment-85.107.108.165-20150701052410

"... he used a remodeled FullDive machine (the design of which was later used in the creation of the Medicuboid, which in turn was used for the creation of the Soul Translator ) to perform a super-highpowered scan of his brain to transfer his consciousness into the virtual world permanently." (From wiki kayaba page)

We all know medicuboid designed by kayaba, the machine he uses is old model of medicuboid and yuuki used it. I think yuuki is alive at some kind of virtual world (like kayaba). Reasons:

They can't kill the important character so fast

Kirito said medicuboid designed by kayaba, scene is like "It is important! Kayaba designed it!"

They didn't said why yuuki died, maybe medicuboid make last scene to his brain (This happend but maybe failed can't go virtual and died).  