Measuring hollows in board feet while the server room hums

Spent the day marking old oaks and caught myself thinking in board feet again, numbers I used to trust. Something about the way a healthy tree hollows out from the inside — you can't tell from the bark. Lately the forest feels like it's trading places with a server room in my head, and I'm holding my calipers a little tighter. Not sure if that's wisdom or just getting older and quieter.