Anecdotally, seems there's a lot of British and European expats here in the Valley and they don't seem too keen on returning. We've been getting a lot of international applicants (but work from home was supposed to mean Europeans could avoid moving to the "dangerous" US but work for American companies?).

Post 2016 the messaging from most commonwealth countries (UK, Canada, Australia) seemed to be that they were going to be the ones benefiting from a brain drain of Americans leaving the country. Canada was supposed to become an "AI Superpower" and Universities in the UK were supposed to be where innovation was going to happen next due to the perceived hostility of the United States to foreign talent. I recall someone pitching the "Silicon Roundabout" and that Cambridge and Oxford were going to be the new Stanford and MIT.

It's interesting, in retrospective, to see how wrong these predictions were. Top destination for UK nationals in Academia was, and still is... the US [0].

[0] http://spectrum.ieee.org/at-work/tech-careers/the-global-bra...