Totally agree. I can't make more time, and I zealously protect my personal time. I want more of it.

I stopped doing side jobs years ago, when I realized that the money wasn't enough to get my mind in that groove, let alone go somewhere and do something for someone. Now I'm getting to the point where I question if my FAANG salary is enough to justify 40 hours/week.

I work a four day work-week (30 hours) and anecdotally my total output is just fine. I generally spread the work over five days, but I often work so few hours in a day that I'm excited to get back to work the next day. It's nice to have that feeling day-in day-out

My observation is a fair number of people are doing this informally.

Spend Friday morning wrapping up the week, making to-dos for the next week, no meetings, minimal email, and generally shutdown for the day by lunchtime.

This isn't so different from lots of offices, except that instead of hanging out the rest of the day at the office chatting and generally getting no work done, you can do the shit you need to get done around the house, so you can actually enjoy the weekend.