You’re a little behind the times, I could walk into walmart, grab a random smart phone off the rack, sign in and walk out with my phone book, calender and documents on the phone by the time I walked out.
I’ve lost an address book, the paper kind, before and that was really bad. I’m pretty happy having a copy on my phone with a backup in the cloud.
The phone(s) do have the numbers but the list is really short, hence scratching out an extra copy in a notebook or two is no big deal.
I have my truly need-to-know info committed to memory. :)