Will Data Science stop being a plan-B for generalist PhD holders?

With the advent of more and more dedicated advanced Data Science degrees, will PhD holders in "general" (non DS/ML/CS) areas stop being hired as DSs in the next few years?

Given the list of requirements I've seen on job listings, it appears that the times in which PhDs were hired due to their skills to learn and think analytically outside the box (if this ever was really a thing), are far in the past. It looks to me that, currently, …

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