Many economists, already from the 19th century, claimed that technological progress would reduce the workweek. Some imagined we'd work 3 days per week, others only 1. Some imagined we'd work a few hours everyday.

I remember many people even on this very site claiming AI would help humanity. I think the most ridiculous the most ridiculous claim was helping fight climate change, but helping produce more leisure time by automating work was definitely what some people thought, or at least what they wanted us to think while pushing their crap.

Literally no one, no one even claimed we would work less due to AI. It is one of many absurd claims about AI here. There was no period in which we would get think pieces predicting more leisure time.

We had plenty of think pieces about making people obsolete, about destruction, generally in celebratory tone. I cant even think of period where AI think pieces would promises much positive - it was sold to CEOs, so pitch was always "higher unemployment".