You evidently have no reality in what replacing wiring harnesses and adding cameras to a vehicle would cost.
My suggestions were that the existing system could be augmented not redesigned. No need to replace wiring harnesses. The cameras are probably like 10.00 apeice.
My take on Investor Day-
I probably look at this a litle differently than an investor. I have more of the nerd angle here I think. I enjoyed hearing them describe the way they make the car along with logistics involved in getting one into our hands. Less pollution and sustainibility are good things, but I can understand why some thought it seemed to go on and on.
I don't blame them for being closed lipped about future car platform design developments in a world where anything can be copied very fast and where a future strategy needs to be kept away from the prying eyes of the competition which is basically all world EV makers. They should not be making it seem as if it's only months away if it's a few years away. These companies are always throwing these early carrots out there. Not just Tesla.
As I understand it, They will either need to retool for a different car in existing factories or build new factories. The most recent factory will likely be ground zero for the next car(s). Tesla needs so many batteries they need to get them from multiple sources in addition to making them in house and even own their own mining operations. I was impressed the motors and setup in the cars can be tweaked to run off of different kinds of packs and batteries. Their direction toward development is open sourced to what they have available to the most extent they can make it. Elon has surrounded himself with some good people who you can tell, work hard to make everything work and improve.
Would those who thought the show was underwhelming have been more excited to be lied to about a time frame or a yet non completed product?? I think this is what Elon is trying to avoid.
HW3, HW4 and FSD-
AI is often discussed as it is a development stack aimed in this direction. Many have reported the car taking over in dangerous situations and saving the day or avoiding a more serious accident.
Here is how I think HW4 will aid HW3 users. FSD has been all about collecting data since the inception. Not only are maps and various traffic situations analyzed, so is terrain and probably any unusual anomalies as they come up. This is all collected,shared and applied to ALL users. IOW data collected from HW4 will improve the HW3 experience. HW4 can tell HW3 things it didn't know up to a point.
Elon has said his goal is to have robo taxis. All of this study is merely leading up to it. I suspect that those who thought they were in an exclusive club with respect to FSD still will be, however as time marches on I see other plans on the horizon that more apply to those robo taxis and to a wider base of users. If they feel some of that function beginning to slip away in terms of adding FSD features to basic auto pilot, they can still know they helped to fund the transition. I for one, don't think things wll stay the same in this area. How they will be changing isn't something I can predict with clarity.