Automation of Manufacturing Process: Transforming Modern Industry

I was just curious about how things work inside factories these days.

Earlier I used to think most of the work is done manually, but now I keep hearing that machines handle a lot of repetitive work. Not sure how true that is in real life.

Like, do companies really depend that much on machines or is it still mostly people doing the work?

Also, does it actually make things faster or just more complicated to manage?

Would be interesting to hear from someone who has seen this closely.