It is much more challenging to go the other way -- there are a lot of people deeply in love with the field, with field-specific training, who would like to stay

It is much more challenging to go the other way -- there are a lot of people deeply in love with the field, with field-specific training, who would like to stay in (at significant financial and temporal sacrifice). That said, if one wanted to move toward LIGO from a software background, the chink in the armor is that the signal-processing is hard and computationally bound. Helping signal-analysis groups to find efficiencies there would have an impact. I continue to keep an eye on quantum-computing infrastructure hires in the Seattle area -- so far, I've proven to be too physics-focused to want to work solely on provisioning the (awesome) cryostats that house the quantum-computing devices under test. That may prove to be a sub-optimal life-decision -- time will tell :).