If I remember correctly OpenVMS was programmed in something else also. It would have been interesting if one of the PC operating systems had decided to use one

If I remember correctly OpenVMS was programmed in something else also. It would have been interesting if one of the PC operating systems had decided to use one of those languages. So, no C, no interest in 'I need a C replacement language', enterprise software is boring, so no COBOL replacement. Plus, I know of at least one vendor who did develop something but it is kept in-house. I did expect someone to develop yet another REXX to address this need.