Based on what you wrote, I expected the comments to be along the lines of "who do these privileged man-children think they are, don't they realize what real work is?". But when I read them, I saw they were more along the lines of "this can't last". Which I agree with. 40 hour weeks (or more) are the norm across the entire industry. I've met some people in small companies who work less (or have a lot of vacation). I envy the lifestyle, but these positions are fairly niche and definitely not the norm.

I would be very happy to do 75% of my current work for 75% of the pay. Unfortunately things don't scale like that for a number of reasons. E.g. a team of 8 people working at 75% will not be as effective as a team of 6 people working at 100%. Coordination is costly, and the fewer people can get a job done, the better.