Does the Workhorse keep track of the lifetime hours printed?
Yes. From the control panel, poke the button to get the menu and select “About Printer” -> “Printer Stats”.
It will report the total number of jobs run, the number of jobs it believes succeeded (e.g. the job wasn’t cancelled), the total number of hours in use, the longest job ever run, and the number of meters of filament that have been extruded.
In about six months I’ve passed 36 days print-time. No wonder I have so many empty spools…