Laundress,
yes, I agree. As people remodeled their kitchens in the 70's, they opted for built in dishwashers also.
My first house did not have one, so I bought a 1989 Maytag butcher block top portable. I did not have to move it, because I had room at the end of the counter and cabinet run. I just let the hoses set against the back splash, and connected it to the faucet run it.
If I know my ex, it's still in there also. Maybe built in by now, but as cheap as some people are when it comes to spending money.
As Hyacinth would say, one must live in the proper royal standard expected of close relatives to dear Mum.