As much as I love writing clever software to work around hardware limitations (I believe it's what makes videogame programming of the 80's and 90's fascinating and led to better creativity and better games), I once had the job of writing software for "broken" hardware. By this I mean I was in charge of a computer vision algorithm, and the camera was physically incapable of taking the images necessary for the algorithm to function. It's worth mentioning this was for a self-driving car.

Tesla will never come close to a stage 4 autonomous vehicle with the hardware rigs they're currently selling. That said, it'll be interesting to see what improvements they can make with software. Given their over-promise and under-deliver history though (which arguably killed someone), I'll take their marketing with a grain of salt.