I can see a maid being popular in countries where almost everyone is needs to work for over 12 hours per day, and take files and office work home to work, or work in a call center where they spend most of their day listening to tech support phone calls for most of the day.
I reading an article on a news website that said electronic smartphone factories make their workers work for most of the day with very little rest, and they live in factory apartments. I think these factories may hire cleaning staff to wash workers apartment, cook, and wash their work uniforms because the workers are spending most of their day working very hard in a factory where the working conditions are bad.