i think the salary would kill the idea for most americans who would want to move. according to this chart:
https://oira.unc.edu/wp-content/uploads/sites/297/2024/05/Fa...
the average assistant professor makes around 100k usd a year.
the salary range in Norway which typically has some of the highest salaries in Europe for university of Oslo assistant professor would be around rank 73-75 (you are not typically eligible to be hired above 78 and in practice above 75) on this chart which is around 69-70k usd:
https://www.uio.no/english/for-employees/employment/payments...
Norway has some of the highest salaries in europe outside of switzerland (although its debatable since cost of living in switzerland is so high). how many people would be willing to take a 25-30% salary reduction to move across the world? and that is the minimum salary decrease as the percentage only increases when you go to other countries where salaries are lower.
Not to mention they will need to learn a new language to be a professor since they need to teach. And also the academic system is different in that most places have more hierarchy than USA whether it is implicit or explicit. So they have to learn to navigate that too.
I think people will find Canada a much more attractive target destination than elsewhere for these reasons. But I also think most won’t actually move they will just discuss it. Happy to be wrong though.