The EU and UK is a long way from attracting top AI talent purely from opportunity and monetary terms.

Not to mention UK is arguably further down the mass surveillance pipeline than the US. They’ve always had more aggressive domestic intelligence surveillance laws which was made clear during the Snowden years, they’ve had flock style cameras forever, and they have an anti encryption law pitched seemingly yearly.

I’d imagine most top engineers would rather try to push back on the US executive branch overreach than move. At least for the time being.