I would think the hw3 to hw4 retrofit would be easy. just swap out the FSD computer under the front and swap out the cameras. I'm sure they could make a kit tha

I would think the hw3 to hw4 retrofit would be easy. just swap out the FSD computer under the front and swap out the cameras. I'm sure they could make a kit that is compatible with the existing camera harnesses (if they are different). Also they would need to make a way to retrofit the bumper cam housing on older models. If they offered this for sale for $8k including the FSD license for older hw3 teslas that don't have FSD it might offset some of the cost to bring up the people who already paid the $8k on HW3.