American tech companies still in america are becoming the unluckiest bunch. Their competitors pay a third of tax, are free from having to answer to the NSA, and generally don't have to put up with cold war nonsense from the likes of the BIS. If it weren't for american talent, many many more companies would make the move.
I agree with your comment. There are also a lot more reasons than just talent for why the US tech industry does so well.
It's the largest singular market in the world. A very technologically advanced economy in general. It's a very diverse economy, with the second largest manufacturing sector, the largest agriculture sector, the largest biotech + pharma sectors, as well as the largest space industry and service sectors - which provides for a very diverse tech demand and stimulant. Businesses in the US have very high productivity rates, so they seek out productive gains as a matter of fact, which incubates a higher demand for technology. The US tends to adopt technology rapidly, the culture is mostly accepting of new tech, which plays into that huge market. Businesses can change state locations fairly easily, shifting to jurisdictions that are more friendly in various ways (either for taxes, regulation, weather or talent depending). In the US the tech industry is regulated at a mostly low level, leaving the market free to innovate and change rapidly. There are a lot of other good reasons.
