A friend (also a physicist, though harder-core) who is a now a data scientist opined to me that the current wave of cross-trained data scientists will be replaced by "kids with their new data science degrees from new data science programs". He didn't mean this ill, but simply thought there was a window of time to make a shift.
Your comment implies you are actually seeing relevant benefit from people with more diverse experience. Can you elaborate? Do you mean lots of hands-on data science per se, or simply a broader practical experience?
Edited: for formatting