The truth is, probably no one in this forum really knows what the current Tesla sensor suite is capable of. We can speculate, but Tesla have already achieved a very capable driver assistance system which partially perceives the world around it with a few low res cameras. We judge on the current capabilities of the system but who says this is even remotely close to the capabilities in a few years.
We don't know, and we still know nothing about the Dojo project.
Elon has always said "the best part is no part". I understand that redundancy sounds great but lidar would add another fusion layer that could possibly go wrong and it's difficult to see what mm-accuracy depth estimation will really bring to the table when speaking of driving. When it snows, how much error/noise will you have to have to filter out of such a system? Do you ignore it entirely?
Look, I live in Montreal (capital of road salt) and my side and rear cameras get buttered every day and everyday I get messages that this and that camera are blocked. Nonetheless, autopilot can handle driving on the road with the front cameras/radar. I also know that people drive with snow covered windows or even just foggy windows. How? Probably because they can recognize moving objects and lights through the foggy windows, at least well enough to determine if it's safe to change lanes or not. I don't see why the perception system couldn't do the same if some light is still getting to the cameras. On top of that, it has 360 close proximity view with ultrasonics for low speed maneuvers. Don't forget that our cars were summoning in and out of garages without cameras, the lizard brain is just using the ultrasonics.
LIDAR requires line of sight, I really don't understand how you can rely on this technology for redundancy in inclement weather. If anything, it will be a source of greater error in these situations. HW2.5 cars dont drive much differently than HW3 cars, is it possible we haven't even scratched the surface of what's possible with a vision/ultrasonic/radar sensor suite with CNN's? I would bet my money on the guy who is launching reusable rockets two days in a row before the rest of skeptics who still have not achieved real-time modeling of the world around them on affordable passenger vehicles. Let's wait and see what the system is truly capable of instead of assuming we know what we're talking about after reading a few articles and watching YouTube videos on Lidar.