It's difficult to tie changes in customer retention to not having a doorman in a "hard data" way. Ideally you'd want to do an A/B test of doorman vs non-doorman, but you'd need multiple hotels for that to work.
This seems like a logical error. I don't understand how an internal combustion engine works, but I know it doesn't come from goblins jumping up and down inside.
This link https://wismuth.com/chess/longest-game.html from the article talks about the 2014 changes (75-move rule and draw by 5-fold repetition) that make it no longer infinite.
Looking at the actual article, the people suggesting taxes on AI are American Nobel laureate Edmund Phelps, and Bill Gates, founder of MSFT. The Europeans suggest more general taxes on capital instead.