Around 2011, my exposure to AI was like Drools planner, the predecessor of Timefold. It was to generate an ideal timetable. It used an n^2 memory heavy Rete algorithm, a scripting language in JVM to write rules with a terser syntax and simulated annealing to explore/choose states that obeyed constraints. In college AI was fancy algorithms and languages with terse syntax.

A few years later I saw - neural network projects which can do basic image recognition - a paid smartphone app that can count objects instantly - determine the mood of an online comment after you trained on a sample

I never imagined a tool that packages all knowledge and requires no training on my part.