This x1000. You've basically described my dream lifestyle. It does seem indeed very hard to achieve without being retired, but I feel like for those making good money in tech it should be at least partially achievable, through a combination of proper money management, relocation to low cost of living area, and transitioning to freelance/consulting. Easier said than done but certainly not impossible .
What sucks is spending 50ish weeks a year doing 40 hours/wk of the same damn thing. I don't hate hard work—I love it—I hate lack of autonomy to choose what to work on, in a very broad sense. Work is nice, jobs are fucking awful.