Making unprofitable cars does not accelerate Tesla's mission as much as making profitable cars (and re-investing the profits into new production facilities). Tesla is production limited, not demand limited. They are not even close to the point at which they can't sell all the mid-sized and large cars they can make. Is there something that all you advocates of micro-cars don't understand about that? On top of that, microcars vs. larger cars makes more sense with gas than EV (because their lighter weight minimizes braking losses). EV's recover a large portion of the braking energy and thus the advantages of making them smaller and smaller is less compelling. The aerodynamic drag of a microcar is about the same as a larger car like the Model 3. But the real reason Tesla is not moving into microcars yet is because they can sell all the larger cars they can make and it's more advantageous to get larger gas cars off the road than microcars. Plus microcars would be a net drag on expanding production at this point in time.