Some modern flight type dishwashers have done away with need for pre scrapping and washing. But remember these machines in common with other commercial dishwashers do not have food disposers. Thus periodically collected "waste" must be emptied.
Other than that as seen in video for reply #9 things have not changed. Commercial dishwashers are largely about sanitizing and getting pre-washed dishware, glassware, pots and pans... the final mile. Things are always scrapped, rinsed, soaked or whatever before going into machine.
Those marketing and using commercial dishwashers largely are under no illusions that like their domestic cousins heavily soiled things can go in and emerge clean.