Actually planning that move myself. My Canadian wife and I had it planned before Brexit, but Brexit seems to have justified it! Threads like this are a little disconcerting however.

Especially since in Europe/UK, developer starting salaries are less than comparable salaries in US/Canada/Aus IMO. So they'd be happy with less to start off with, and chances of them moving to the US are smaller, because they can't get TN visas.