Printer operation stops only for three consumables whose ends-of-life might otherwise cause damage to the printer. They are the toner disposal box, fuser oil (printer stops 50 pages after warning light first appears), and the fuser assembly (printer stops 500 pages after warning light first appears).
Ends-of-life for toner and photoconductor cartridges do not stop the printer although image quality will begin to degrade. For example, toner end-of-life is evident by uneven or incomplete toner coverage. Photoconductor end-of-life is evident when you begin to see thin vertical black lines starting about 8 mm from the top and running to the bottom of the page.