And the same parallel for driverless car, except for even when well executed it is kinda of arguable usefulness/value.

Are regular cars useful? A self-driving car is just as useful for someone who can't drive: minors, many seniors, many people with disabilities - or people who just don't have a driving licenses, like me.

I expect them facing same issues like trams and trolleybuses - terribly bad experience in traffic.

You only see risky people aggressively trying to overtake and scratching their paint, while leaving the driver no opportunity to move an inch.