Literally today I was checking out of a rental car center and the checkout person loaded up an emulated green screen mainframe program to complete the process.
I know for sure that Avis's reservation system runs on mainframe.
To me, that means that the business logic of rental car checkout and return is so complicated and/or nuanced, it is cheaper for rental car companies to find/retain mainframe developers to keep these running than it would be to re-platform onto commodity hardware.
Also, given that basically every industry is powered by a handful of mainframes, it is surprising that COBOL/Fortran developers aren't making insane money like I thought they were.
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