Aside from the excellent answer that was already given to you, I feel that that law (whose name I can't remember) applies here as well: any empty space quickly gets filled up. The moment the productivity spiked the business adapted to demand that additional amount and things "normalized" probably in the matter of a few years, if not few weeks.

Reminds me of one former colleague whom I didn't have high opinion about but he is very right when saying: "Do not work more for the same money. It becomes a baseline expectation the moment you demonstrate you can handle it, and you will never get a raise".

The war of life-work balance is in full swing and us the people have to collectively push back as hard as we can. After all, the concept of the modern work is unheard of anywhere in the nature, is absurd and unnatural. Hell, even the humans worked roughly 15h a week just a few short millenia ago.