Everything I have/configure is 100% in Ansible. I learned the hard way that rebuilding a workstation from scratch sucks if I only depend on my brain to remember things.
It takes some effort to keep it updated - if I’m trying out a new app, I have to remember to add it to my config.
The other thing that I’ve started doing is using Restic for file level backups. That’s relatively easy to set up, it supports a multitude of backend storage, and works well with a cron job for braindead backups.