Because they are cheaper, no spare is cheaper, no jack is cheaper, and a can of fix a flat is cheaper. I guess weight loss as well.
Flat tires are almost a thing of the past, I don't think most people know how to change a tire.
Also roadside assistance is cheaper overall to provide, especially given the use case of EVs. Although M cars have been fit a flat vs spare for years.
So costs/weight would be my guess/answer.
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01 Z Coupe, 5MT, SB, not much else
08 M3 Coupe, 6MT, JB, not much else
21 M2c Coupe ,DCT, SOM, not much else
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