I never had any difficulty driving car when it's sunny and dry and the roads are wide. There is no system that can drive in darkness,rain,snow,ice,on narrow  <br>curvy and bad roads with any conviction and there will not be one for a very long time. These things are useless for driver,one needs to be engaged whole time and hope to get some warning and assistance when needed. My point being  you either don't need it or it can't help  you when you need it for 99,999 of time.<br>So,what's the point? Have you ever tried automatic parking option on newer cars? That's somewhat usefull if you're Stevie Wonder.