This was the promise. But all we really have today is cost disease. For every microwave the US also has infrastructural costs that are 10x+ that of other countries and a culture that is being increasingly incentivized to hand over their wealth for short-term, materialistic gains, and goods/services that aren't worth the price being charged.
To say nothing of the fact that in most cases, said microwaves leaves you with lower-quality results concomitant with the time you saved. Which really feels like all of life; we are being sold a bill of plenty that is only paper-thin