>>348486752
>This is true I forgot about blendshapes which are also better for performance than separate meshes. 
Not really, disabling a mesh is better then shapekey, as the mesh will still be there as a shapekey, but will not be rendered and calculated if toggled off.
Given the VRC max is 70k polys, this don't really matter. And if you go into very poor status, perf don't really matter either, go nuts.