I could be wrong, but it seems that there's no great shortage of companies offering 4+ weeks of PTO per year in the US. Or are you expecting more vacation than that? (Or are perhaps otherwise constrained as to the choice of employers?)

I've got 4 weeks paid vacation. It really doesn't feel like much. That's only 1/13th of your weeks being work-free per year. I personally would like more. I think something like a 20-25 hour workweek plus 8-12 weeks of vacation would be good enough that I would stay in the workforce long term. As it stands today, it seems more feasible to continue working full time, hit FI in a few years and retire early rather than find such a good work-life balance.