1. The cheapest American city is maybe half thr cost of the most expensive. Meanwhile in the most expensive Indian city, one could live like a king at 1/3 the cost of the cheapest American city with far more culture and things to do. And if you were willing to move to the cheapest Indian cities you could halve that again.

2. Correct. Given that the majority of SW jobs, especially the highest paying ones, were located in the U.S. this is a net benefit to anyone living outside the U.S. even before you take cost into consideration. More American jobs opened up to a Londoner than global jobs opened up to someone living in SF.

3. Efficiency approximately = lower costs. In this case costs = developer salaries.

So you’re right. We got more efficient. We reduced the average cost of developer salaries per job. Since very few people are willing to take a pay cut this means jobs are moving/will move to places where people are willing to work for less.