I am assuming this needs a supported car since you use radar/ACC for detecting lead cars. When will this come for cars with panda but no radars (vision only) ?
The depth output of our vision stack is currently not accurate enough to reliably measure relative speed. However our ML team is currently working on new models. Maybe in the future this will be accurate enough to do this without a radar.
The chffr team is now mostly working on improving the dashcam experience.
The grey panda is a panda where we replaced the wifi chip by a high precision ublox GPS module. We can use this to make high precision maps, and in the future this will allow us to stop at traffic lights and stop signs.