The C2 will no longer be supported after a short period by Comma support. It will still be supported by individuals, bot not officially. The C3 is going to be upgraded on an ongoing basis through Comma, and individual programmers. I is projected to be FSD in the future, with stop sign/light recognition and other road signs including speed limits. I have a 2 and a 3, and the 3 offers a much better interface and control. Also, the $600 you see is without the $200 harness and connection cables and boxes, so you be the judge. It is up and working on my RAM and, although not officially vetted by Comma, it should go mainstream soon. I enjoy the fact that my longer drives are much moor relaxing.