A counterpoint to that is things like batteries, ram, motherboards, etc. in laptops (and pretty much every other device that uses rechargeable batteries). The fact is that for better designs the batteries are probably not going to be easily standardized in electric cars (also kills innovation).

PC motherboards aren't trying to use the least amount of space possible, because desktops can be large. The same isn't true with cars, the space matters.

Motherboard standardization is not even close to comparable.

You have to standardize the dimensions and unlatching mechanism of a huge battery out from under the car and latching a new one in. It has to support a battery that weighs around 2 tons. This isn't just a matter of scaling up a AA battery connector. And then you have to convince all, or at least most, of the manufacturers to do that in order for network effects to help the process. Since we've had to do a lot before manufactures settled on a plug design, we're not likely to do the same for batteries.