Random idea: When a recommendation is not being followed for a customer because of some deliberate or idiosyncratic reason, a notes field could:

1. Help them remember why, so that they aren't confused the next time they re-run the checkup. ("Oh yeah, we wanted to do X but we can't until we retire Y because it's not compatible.")

2. If it's clearly labeled as info also shared with Tailscale, product managers could use it to help generate theories about why certain customers don't do X.