I think the grinder is a matter of convenience. It means there is no filter to change, ever. I've never actually had a dishwasher with a filter. I don't even kn

I think the grinder is a matter of convenience. It means there is no filter to change, ever. I've never actually had a dishwasher with a filter. I don't even know where it is located! If the filter were very easy to reach/remove/clean/replace, I would consider the benefits of a dishwasher without a grinder.