Back in the dark ages when cells were molecular and phones were for spoken communication, it may not have been simple but it was predictably segmented. Tasks were sequential, not simultaneous. People could disappear for minutes at a time and emails could languish undetected for whole afternoons when a recipient was off grid.
Smartphone technology created expectations for increased and untethered productivity, because they allow us to engage in extreme multi-tasking. But, how well do you do it? Is your smartphone-ish office efficiency truly effective?