There are many in-house tools (say at banks) where Java code generates... COBOL. It's wild: in the video you linked it's explained COBOL was meant for machines that don't exist anymore so COBOL is running inside emulators.

So you have Java code, generating COBOL code, that's then run on an emulator emulating an old IBM system that was meant to run COBOL. It's just wild.

Some of the tools are even front-facing users (bank employees): at times you can still see at some banks an employee running an app in a monochrome green-on-black text terminal emulator that is basically COBOL.

It's weird, just weird. But legacy code is legacy code. And if you think COBOL's legacy is bad, Java is going to dwarf COBOL's legacy big times (for Java is typically used at the kind of places that still use COBOL and it's used way more than COBOL).

So in the future, heck, we may have a new language, generating, inside an emulator emulating current machines/OSes, Java code that is going to be code generating COBOL code (!), that's then going to be run in an emulator.