Ithilgore said:Darth Vader was just a guy in a suit in ANH, he wasn't a cyborg until ESB, which is why his voice changed to be more robotic
That's not one of those "hindsight" things, is it? I thought that even in early drafts (and earlier?), it was known Vader had already been damaged by the lava and thus the walking iron lung he was even in ANH.