[ivorbuk]

100% it's this.

I've been in the room when making this exact kind of product proposal (not MB). The pushback from drivetrain and electrical on warranty, repair, battery life etc was intense and directly related to future satisfaction. Sure, you can push the envelope on the spec, but it does tend to come at a cost.

Say they give this option for free... And it reduces the battery life/capacity by 10% over the course of a year. Pretty sure people would be clutching their handbags in horror.

You buy a car with a spec. Aftermarket mods are definately a thing to increase that spec, and they've been around for a while, both for ev and ice. They've always been available at a cost. This time it's from the MFG and we all lose our minds.