[lsc]

this is the thing about most of what we're doing with machine learning. It gets exponentially harder the closer you get to 100%; most of the things we use machine learning for where it works pretty well, 99% is really pretty great. 99% won't cut it for self-driving cars.

Which isn't to say that self driving cars won't get there, just that the fact that it looks like we are almost there doesn't mean as much as you'd think; we still have the really hard bits in front of us.