China is not very immigration friendly to non-han folks, but I guess chinese researchers won't make it to the US and this already will have a great effect on the chinese economy.
Europe is in its own set of problems and it is not in the same situation that US used to be after WW2 (only major economy not affected by bombing).
Europe's problems:
* active major war in Ukraine (lasting longer than Axis/Soviet war in WW2)
* energy supply issues (unlike US it's not energy sufficient and the places that supply it with energy are involved with wars)
* a wall of people aging away from employment and into doctor's and hospital waiting rooms (forcing less investment into research and roads/bridges/railway, more towards stabilizing pensions, healthcare)
* major pieces of the european export economy are being replaced by China (eg chinese car brands eating the lunch of european car brands).
Whether China is immigration friendly or not is debatable. However, here's a recent announcement from last week:
Nobel Laureate in Chemistry Omar M. Yaghi joins Tsinghua University full-time https://www.tsinghua.edu.cn/en/info/1244/14984.htm
> China is not very immigration friendly to non-han folks
What do you mean? I've never been to China, but know quite a few non-han white Europeans who lived there for both shorter and longer periods of time. Some studied, others worked there.
> Europe's problems: [...]
Would it be silly to add "general lack of air conditioning" to that list? I imagine at some point it inevitably stops being a joke and starts being a real problem. Have we reached that point yet? [1] [2]
[1] https://www.carbonbrief.org/guest-post-frances-june-heatwave...
[2] https://www.dw.com/en/heat-wave-european-countries-report-37...
You forgot, amomg others, increasingly non-white popation due to laughable immigration policies; absurd environmental policies that result in high energy prices; red tape and high taxes in every aspect of life.
> Europe is in its own set of problems and it is not in the same situation that US used to be after WW2 (only major economy not affected by bombing).
Both Japan and South Korea were equally devastated and yet they managed to build world-class technology industries in the subsequent decades. I think the problems with Europe and the EU are a lot deeper than that.
Europe is not immigration friendly as well if you don't speak the native language, of course one could live in an English speaking bubble, but I'm not sure how feasible it would be in Academia.