stainless steel vs. other materials
Well in Germany ALL washers were switched to stainless steel drums and outer tub-container when s.s. came onto the market in the early sixties and Miele still use it for both. Also Hoover used it in their twin tubs whereas Hotpoint always had porcelain tubs.
When I lived in a hard water area after a while the heater element furred up and I put some vinegar water in it to dilute the calcium/magnesia-crust arround it. Since I did, the porcelain is ruined and the surface is like sandpaper...
THAT would not have happened with stainless steel! Also s.s. is totally chlorine bleach safe.
Plastic is absolutely not my cup of tea and I think it is a very poor material for that purpose although it is said to give better insulation which some manufacturers made switch to that material for the outer container in FLs and China produces even spinner cans and the whole machine from plastic!
Before s.s. came onto the market, the materials used for washing-machines were: copper (tubs, drums), zink-coated steel (outer containers, tubs, washing-presses), monel-metal (tubs and containers) and aluminium or enamel.
Ralf