I lived for more than 40 years without a dishwasher. I was actually hostile to the idea. For a computer guy, I can actually be fairly reactionary towards newfangled technologies. So many of them, like microwave ovens and MP3 players, trade convenience for quality. When you go down that path you wind up with a life of easy mediocrity.
I always assumed that dishwashers fell into that category. Now I don't know what I was fighting against. There is little joy in washing a dish by hand. Modern dishwashers are more water and energy efficient so they're actually better for the environment than hand washing. They do as good a job or better vs hand washing at getting the dishes clean. They reduce marital strife by reducing the amount of time needing to be spent doing something nobody wants to do.
I don't know how I survived this long without one!