Comment by paxys

The USA took literally all of India's top engineering talent for the past ~25 years, but thankfully that trend is reversing now. While improvements in standard of living, more urbanization, emergence of a real middle class, more local opportunities etc. are definitely all valid reasons for this, I believe the biggest one is that there is no path to US residency or citizenship for an Indian today. Even those educated at top universities there have to eventually come back (and that is great!).