Which made cheap shoes and clothes available to everybody.
If you want to buy a tailor made shirt, it'll cost you at least $500. And that's still with machine made cloth. What do you think it would cost if the cloth was made by hand by a weaver?
I'd argue the efficiency in production led to lower prices - while the concentration in wealth mostly kept buying power/living standards lower for the workers (or; capitalist class reaped an unfair share of productivity gains).
I believe commodisation of "knowledge" work will lead to lower prices (and unfair distribution) too.
Go take a look at Fort Williams, and at the clothes in it they preserved. They look like kids' clothes. The same for Civil War uniforms. Larger than the FW clothes, but still looking like kid clothes.
I flipped through a high school history book a few years ago, and it insisted that the middle class in America didn't emerge until FDR. This is laughably wrong. It was there from the beginning.
Hello post-industrial/ai/ml capitalism.
This development will do to designers, programmers, support what the industrial revolution did to cobblers and weavers ...