I doubt the dual dishwasher strategy works, as it’s unlikely that the clean dishwasher will get completely emptied and you’ll end up with both washers with dishes you want but sometimes mixed with dirty dishes.
I actually have two dish washers and this is indeed a problem. We just clear out what's left into the cupboard. If your usage pattern is non-standard, for example because people come over, it also breaks down. But on the whole I'm happy with the time savings.