Well.... I am going to try to give you a perspective as someone who worked in product engineering for nearly 40 years for a very large OEM, with 15 years experience in hybrid and electric propulsion and vehicles. If you really get into this, you will find that in most cases the form follows the required functions. What most people don't understand about electric vehicles is their relative complexity. The usual mental model for the uninitiated is that it's just a battery and a motor--how hard can that be? And wow, you can just throw in wheel motors and everything is cool-- lots of space to do anything. First, wheel motors may come of age, but they are relatively complex and expensive and often place a lot of unsprung weight out at the wheels where you don't want it. Next, high quality electric cars are not simple. The magic that allows modern electric vehicles begins with high power variable frequency inverters to drive the motor(s) and advanced batteries. If you don't have wheel motors, you need a "drive unit" (think transmission) that contains motors and gears. This requires complex support systems for thermal management (cooling the power electronics and managing the battery), charging, control systems, HVAC systems, heavy copper cables, junction boxes, contactors, electronic controllers and so forth. All of these things require packaging space and many require air flow. You can move them around the car, but they must not intrude on passenger space-so most package under a conventional hood or trunk space. Take a look under the hood of a Bolt (EV) or a Prius (Hybrid) or one of their competitors and look at the amount of hardware required to make it go. Finally, an electric car needs to be integrated to meet all of the customer requirements for function and driving range (mass and aero) while complying with all the regulations by various government entities for crash, pedestrian protection and so forth. Vehicle integration in the electric world is just as challenging as in the conventional world, perhaps tougher. I do think we'll see more variation in designs over time, but certain facts of physics will limit that to a great extent.
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