I do write for a living, and I found Zettelkasten too high friction to be worth using. Plus, as Cal Newport has argued, it solves the wrong problem. The whole pitch of ZK is that you can jump into your notes and quickly generate new ideas. But experienced writers and researchers rarely struggle to come up with ideas—rather, the real challenge is execution.
My guess is ZK is used primary as a very complex and tedious form of procrastination. Writing the book is hard, so instead, one can endlessly tweak and tune their notes and feel like progress is being made.
