It might be my area. Most COBOL infa got replaced or is on life support. But I did happen to see the good stuff once in a while. There's a reason it was not touched.
A small part of me thinks it might be the place to retire. Working on old code bases.
I used to work with COBOL. The language isn't terrible, it's the 40+ years of no context changes that suck. It even works with SQL... although the most common configuration is using a flat file.
The best fedi is one they don't even know they are using ;)