Agree, 4x is doable only if you have no kids. Otherwise you not only create a lot of stress for the other parent but you also lose valuable time with your family, which you won’t recover as kids grow up. I feel like 2x is reasonable.

I don't have kids and I'm still more on team 2x/yr than 4x/yr by a large margin, but I'll still take 4x/yr for ~3 days each over in-office daily (or even twice a week). Mentioned it mostly as a compromise option I could accept (and IIRC that compromise is what 37signals did and documented in the Remote book which I haven't read in quite some time).