Jut one more data point:
On our boat the dishwasher was removed to make room for more storage a long time ago. We do not miss it. We use way less water washing by hand, and do not find that to be a burden.
The clothes washer we use when we are away from the dock for extended periods (which is common). If we know we are going to be tied to shore with access to commercial laundry facilities, we might save up laundry to do there. On our Amel we have never done laundry by hand.
Fort Lauderdale, FL