How intelligent is artificial intelligence?

How smart is artificial intelligence and how fast is it advancing? In a recent post I mentioned machine learning research that taught an algorithm to master 40-year-old video games. If Atari 1982 video games are the peak of 2020 research, how hard is it to train an algorithm to play Pong, which came out in 1972? Machine learning can master the game in about 250 lines of code. In fact, Pong is one of the most popular ways of teaching reinforcement learning theory and practice.