I would hypothesize that we measure our free time in boredom. With smartphones in our pocket and the internet always available, we're rarely bored out of our mi

I would hypothesize that we measure our free time in boredom. With smartphones in our pocket and the internet always available, we're rarely bored out of our minds any more - there's always a distraction to be had. So we feel like we have less free time and thus less time to spare for others.