I was suffering from that very human problem of reading and replying when it was late; I was tired and thinking mostly of getting away from the screen and into bed. Maybe the lack of fatigue is one area where AI will excel despite the lack of creativity and ingenuity.

That depends a lot on the selection of the training data. If 99% of the distance driven is from New York taxi drivers, your self-driving car will be very good at honking the horn the millisecond the lights turn green. But it will be extremely confused by cattle on the road the first time it drives in a rural area.

The same goes for an AI system that reads and write comments on forums. My guess is that it will be superb at trolling people and posting memes but will absolutely refuse to read the second paragraph of any post, ever.