And you ideally would have one of the large sinks and huge water hose to pre and post rinse the dishes if need be. From having used one of the commercial kitchen dishwashers, I think the amount of work is actually more than for a home appliance dishwasher, but the benefit is speed. There is no waiting around.
(The chemicals are probably also dangerous to the intestines, as seen on HN.)
- the mechanism is large compared to the capacity
- they are noisy
- they require lots of power
- they need to be pre-heated (so only make sense if you're running more than one load)
- they require more chemicals for the same load sizes
People have done it, but it's not that practical for most people, especially if you're only washing up for one or two people.