A dishwasher is, IMHO, not unnecessary. If they’re used efficiently ie only run when they’re full, they use considerably less water than washing by hand does, does a better job than I do and I push a button and don’t have to participate any more until it’s done. Plus, depending on the energy makeup of your country/home setup, use a lot less energy to heat the water than your domestic hot water does too.
A dishwasher is, IMHO, not unnecessary. If they’re used efficiently ie only run when they’re full, they use considerably less water than washing by hand does, does a better job than I do and I push a button and don’t have to participate any more until it’s done. Plus, depending on the energy makeup of your country/home setup, use a lot less energy to heat the water than your domestic hot water does too.