I don't claim there is NO progress; just that it's extremely weak compared to the huge triumphs of, say 1820 -> 1970. re: face recognition: Viola Jones is almo

I don't claim there is NO progress; just that it's extremely weak compared to the huge triumphs of, say 1820 -> 1970. re: face recognition: Viola Jones is almost 20 years old (we've been talking about 20 years periods). Eigenfaces is over 30 years old. I don't believe in Driverless trucks, and it is emblematic of current year whenever I talk about technological progress, people bring up something that only marketing departments claim actually exists in the corporeal world. FWIIW by "KNN" I don't mean the O(n^2) classic; the thing Google was using before was a bit more sophisticated than that, and it worked just fine. For some languages it worked better than the "advanced" RNN version of things.