Re: 95% done or 95% of the work remaining?
I suspect that there will be situations where the machine "intelligence" (really a hyped-up and limited state machine) will not cope because it can't adapt and will cause avoidable accidents which would get a human driver mocked, insulted, attacked, or prosecuted for!
I also expect a rising number of vandalized/rammed vehicles after "driver-less" vehicles start to make serious inroads into commercial and transport driving, because they'll put loads of people out of work. What are all those people going to do, given most work will become more skilled? They'll eventually rebel/riot! Also, demand for the vehicles will ironically decline, because there will be less people with sufficient income to afford to use them or the goods they deliver, compared to earlier human driven vehicles!!!
Blindly adding more technology for (fake) "progress" (a common communist-like misuse of the word), which mostly benefits rich people, is a very bad idea, and only will speed-up the on-going decline of developed countries, warned about by "Unabomber" Ted Kaczynski's Manifesto, and others referenced by the "Return of Kings" web site. We should have learnt the dangers of fake "progress" from the rise, stagnation, and collapse of Rome, and earlier civilizations!
Making everything thing easier (e.g. by automation) is dangerous, because it gradually encourages parasitic rentier corpocracy, encourages parasitic socialism, encourages r-type degenerate humans, rots the spirit of Man, and eventually leads to nation and/or civilization collapse!