Offshoring was similar - i.e. companies discovered that expensive labor here can be performed inexpensively there while senior laborers/PMs here would perform the overseeing role - and we can look at it how long it took to digest it and adjust to it. While 15-20 years ago it was all the rage, today it is just an established well understood and efficiently utilized, where applicable, practice.

Yes.

However it wasn't just noticing the difference in wages. That had been known since forever and didn't wake a genius. Figuring out how to produce efficiently in the cheaper places and get the goods to rich markets took more smarts and experimentation.

Container shipping played a big role in that, and so did modern communication and cheaper flights.