I did an internship at a fortune 100 shipping company and can confirm they were very much still using z/OS and REXX. It's similar to all the COBOL code - it's w

I did an internship at a fortune 100 shipping company and can confirm they were very much still using z/OS and REXX. It's similar to all the COBOL code - it's working and not worth the risk/cost of a migration