I guess a whole bunch of my opinions and experience based on reading about the different tech scenes. I'm not factoring in things like "employee happiness as a separate vector" (in my opinion, in this argument, that's "second place consolation prize" for Europeans justifying why their tech scene is better). I'm assuming that however terrible the US scene is claimed to be, it's can't be bad in the sense that any badness has not destroyed its productivity. It's still no. 1.

To me the point of a tech scene is to be large. As in dollar value. Generate capital in terms of valuations, market cap, revenue and funding for new ventures.

Attempt to summarize the experiences, readings that contribute to my view:

Number of startups in US. Size of tech companies. US tech scene companies ranking in world's largest organizations. Personal experience with those companies.

Size of China market. Number of Chinese tech billionaires. Number of massive Chinese tech companies, and their ranking in world's biggest companies/tech companies.

I don't think any hard analysis of the data is going to disprove my claim that world tech scene's are ranked: US, China (close second)

But if it did that would certainly be very interesting and high value information to me! :p :) xx