Sure, so minimal commute times and affordability of family homes in areas with good schools should be very appealing to many of the specialized senior engineers.

Moving the family is a pain, sure, but that just means the pitch needs to include why it's worth it for the family. And it means that senior engineers move cities less often. It doesn't mean they move less altogether.

Idle thought: this kind of risk (moving around too much) could be mitigated a bit by some sort of contractually guaranteed employment. A move to Princeton from SF would sound better if a four-year employment guarantee or a comparable cash buy-out was part of the employment agreement.