The real value is catching gradual changes a weekly check misses. A spindle bearing might develop a faint whine over four days that you'd never notice jumping from Tuesday to Tuesday. Your log gives you a baseline of what that specific machine normally sounds like, so even tiny shifts stand out. It turns subjective noise into something you can track.

Seriously, are day shifts really that much better?

My buddy ditched all stickers in his planner and just uses a pen now, says it's freeing.