Believe me it's not about the developers. Even just a few years ago premium, even luxury makes used a 333 MHz processor in the head unit to power their onboard

Believe me it's not about the developers. Even just a few years ago premium, even luxury makes used a 333 MHz processor in the head unit to power their onboard entertainment. Again, it's no such much about software - in safety critical automotive ECUs load must never reach above 33% or so. The hardware is ridiculously underpowered in most cases due to cost cutting. Remember most car makers operate on razor thin margins, often (much) less than 1k USD per car sold.