It's pretty ready now. I use it all the time and love it. Living in FL means it makes me a safer driver, not a lesser one.
Our highways often have no merge lanes. The entrance ramp ends directly in the highway with no dashed line. That presents you with two choices... 1) ride the lane until it ends, and expect you or the car next to you will slam on your brakes; coin toss to who does. 2) look behind you and see if it is safe to cross across 20 feet of "don't merge" zone; risk running into the car in front of you because they lost the "break coin toss". Mirrors are useless because the other lane is too far away.
Autopilot is safer here. I can engage it and trust it will react to what is in front of me and keep me in my lane. That leaves me free to look behind me for a safe merge point, take over, and merge. I can do so in a way that doesn't surprise anyone, and doesn't force anyone into quick decisions, something that should be avoided on the road at all costs.
Sure, sane highway design would make everyone safer. But... I live in Florida, and #floridaman isn't a meme because my state is known for thinking consequences through.