I think a lot of people just have an issue with wrapping their heads around the idea of mass displacement and subspace pockets. Some like to balk and claim it's some sort of comicbook nonsense or unscientific conspiracy, even though the theory was created and defined by facts mostly from the cartoon. It's simply not possible for all the moving parts and working components of both modes to be in the same space without mass displacement, and pretending Megatron wasn't a gun and Soundwave wasn't a cassette player just ignores that it aides in all transformation in some degree. Perhaps moreso in the later era of Beast Wars, which defeats the arguments it's just animation goofs (never mind that many times in the cartoon there were flashes of light when objects moved through subspace, which involves transparent space in the cells, matte layers, and backlighting). I think it really adds to the impressiveness of transformers; mass displacement probably has been applied to numerous fields of Cyberton tech like weapon ammunition, miniaturization, fuel storage, and other stuff that'd otherwise make their massive level of firepower and space travel impossible.