I'm with you. But we're probably in the minority. I notice that my after-work hours are vastly improved if I work 1-2hours less than my usual 8 hours just because those last hours are the most draining, somehow, mentally. So cutting those would improve 5/7 days instead of the 1/7 day improvement with another free day. But anyway, I think in the modern office environment both options should be available. It's available where I live (Germany) but I think most bosses don't really like people exercising these options (I'm waiting for my next promotion before I do it ;)).