A 28-year-old attorney I know continues to use a Monthly 4 in addition to his two iPhones (one personal, one work) plus his two Macs. 
Since he is such a big Apple fan, and seems to rely on his phone and apps for everything, I was curious as to why he was so faithful to the Monthly 4? He said he liked the security of a written record, and to see his whole month at a single glance. He said writing things down helps him to remember them. He is not a fountain pen user, so he doesn’t have the same romance with paper.
Do you use a paper planner in addition to your electronic calendar? If so, how do you manage both that they complement one another? Is one efficient and the other emotionally satisfying?
Count me as paper-planner only as well. I keep track of my work hours, any special events, and weather each day. The electronic version in my iPhone gets almost no use except when I’m traveling.
I used to be a big electronic calendar person, but I tend towards paper only these days. Pen and Paper is much quicker to look up and enter than any electronic calendar.
I had the usual syncing issues, appointments disappearing etc with electronic calendars, it’s got better with iCloud and iCal but paper wins the day for me every time…
The only thing I use electronic calendars for is to print them out as blank templates to put in my planner!
I am attorney too, and I am also using paper planners. Take notes in every meeting and so on.
Digital planners and notes are kind of “cold” looking. I don’t like to review them after a while.