BMW's next big thing is the 1-Series coupe and convertible. Propellerheads are positively dizzy at the prospect of a new, small-ish, rear wheel-drive BMW offering a modicum of practicality, brand-faithful weight distribution and one of the company's legendary in-line six-cylinder engines. Why it's the 2002 reborn! Hello? Has the entire enthusiast community been neuralized? They seem to have forgotten the fact that BMW already sells a model answering to this description: the Z4 Coupe. Or, in fact, doesn't, much. And for good reason: the Z4 is a rolling condemnation of BMW's evolutionary commitment to ultimate driving, a four-wheeled cautionary tale for anyone blinded by the BMW badge.