Indeed, French labor laws and their downstream effects have pushed the most talented French researchers to US-based frontier labs, thus building one of the most competent cohorts of international AI scientists.
Do you really believe this? Lol
Could you please elaborate what labour law drives the labour out of france?
This has more to do with the humongous amounts of money sloshing around in VC funds and the disproportionate importance of the US in the global financial markets. They just followed the money. Those who are successful in securing funding then tend to come back eventually.