content: Why build custom hardware when hardware exist that can do the job well? The argument you are making makes no sense, yes it's expensive but a solution already exists in the form of exist hardware and open software why re invent the wheel fork the damn project order the hardware and move on to quality control and testing. For 86 million I could literally buy and outfit the cars with everything in them tested and ready to roll and still walk away with 10s of millions left over, for under 300 cars jesus.