It would be nifty IMO if dishwashers had two water feed lines, one for wash and one for rinse. Then plain water could be used for washing and expensive softened

It would be nifty IMO if dishwashers had two water feed lines, one for wash and one for rinse. Then plain water could be used for washing and expensive softened or other low-TDS water could be used for rising. Or bonus points for a dishwasher that uses RO concentrate/brine for washing.