Why?
They have growing middle income aka 'middle class' consumers.
People coming into money. Companies will adapt to provide that group.
Old? USA, UK.
Even Mexico City is a cooler city right now.
Youtube is probably the most popular website online. And most viewers are not from the USA, they are from India and Philippines. Sheer population numbers. 1.3 B in India and 300 M in USA. Do the math.