I have Autopilot one. With only one front facing camera and the Mobileye system. I know it would be too expensive to put all the new side cameras in my original (less than a year old) AP1 Model X. If possible, I still would want to update the current AP1. I wish Tesla would offer to switch up my single front facing camera system to the current triple front facing camera system and switch over to drive PX and Tesla Vision. Reading stop signs and lights would be a tremendous upgrade. I guess without the side cameras, it would stop at a stop sign, and you would have to re-engage the accelerator to move, but that would still be awesome. Although it would never be fully autonomous without the side cameras, I would love that feature.