Now the question is whether just the renderer and associated modules are multithreaded, or the entire app. Although being up to multithreading at reason 4, one wonders if we might actually see some of the more esoteric requests like weightmapping in some form, or dynamic micropoly LOD around joints, or actual soft body dynamics to a limited degree; multithreading would make the calculations for sbd reasonable.... Customizable UI is also probably one of the reasons... ...and wouldn't it be a hoot if they'd implemented .daz file support? Or possibly .psd export support, Vue Infinite.... Is it time for 5 yet...?