This popped up in my YouTube feed. It says circa 1950 but I think it might be somewhat later, maybe 1954 or 1955? No matter, there are some very interesting ideas and appliances shown.
It may seem corny or antediluvian today but from early part of last century until well past post war era scores if not hundreds of highly educated women (and some men) turned their attentions to home economics. In USA land grant universities such as Cornell had entire home economics departments that covered study of everything from laundry to other aspects of home making.
Indoor plumbing, electricity and all the mod cons that followed were great in their own way, but kitchen, laundry and designs had to change to lessen the drudgery.
Joining this bandwagon were everyone from home builders to appliance makers.
One of the biggest forces behind all this rush towards efficacy and so on was something that began before WWI and only became more dire as time passed; the servant problem.
Previously educated upper or even middle class housewives could employ a small army of servants or at least maybe a cook and maid of all work. That began to change for host of reasons. Much of it simply because the lower classes (from whom servants were largely drawn) became the "working class". Instead of working in someone's home there were jobs in factories, shops, offices and elsewhere. Pay and working conditions were usually far better than domestic service.