Hi, When I bought Unity 5 I remember that it was advertised that it is in the roadmap the ability to remove unused parts of the engine to make the build, eg apks smaller. Eg if I make a simple 2d game, why pack the 3d engine or the huge 3d physics, lights etch. All these should be packed in pieces only if they are used in the project or at last we can have a choice to take out parts of the engine. I made a small app before some days, very simple with a few graphics and it packed 32mb in android and 64 in ios because of the 64bit code. This is just a waste of space.