That also provides a vector for experienced COBOL devs to make _serious_ money as instructors. Banks would fly out trainees anywhere on the planet for any fee if it meant critical systems have the necessary ops guys.

It's also a great proposition for a grad student. They don't have to unlearn much, they're in a perfect position to absorb a new language, and the term 'set for life' can be thrown around liberally.

Wouldn't be surprised if this was already a thing, probably in the form of COBOL-specific Consultation services.