I drive a 2008 model year car so it doesn’t have the traffic assist electronics. In the last few years it seemed like people were glued to my bumper on the interstate. I’d speed up and then slow down and presto, they were tailgating me again at a constant distance. I drove a vehicle a few weeks ago that answered the question. It had adaptive cruise control. It had several settings which allowed tailgating highway speeds. Not good in my book..
1984 here.