"In a survey of more than 1,000 “white-collar workers” across the U.S., people reported checking their e-mail an average of 2.5 hours each weekday. ...according to Adobe, which conducted the survey..." https://fortune.com/2018/08/21/email-habits-attention-study-adobe/ https://theblog.adobe.com/love-email-but-spreading-the-love-other-channels/