I did not like like or dislike the evolution to 1UPT. I accepted it as a new challenge to building an empire in Civ, one of my favorite games. Whenever I think of 1UPT and the challenges to the AI, my mind drifts to chess (1UPT too). It is challenging to build chess AI that sees things well two moves in advance to move a single unit. How much harder is it when there are 1) so many types of units 2) different types of terrain and a variable playing field 3) the moves of multiple units need to be computed for multiple units 4) so many factors to determine whether you are winning or losing. I can understand why it's so hard to build an AI with long term strategic thinking. I imagine even 2-3 turn tactics are difficult. Which makes me wonder whether 1UPT was the right decision for now.