We learned COBOL, CICS, and JCL in college (in the early aughts), because we had a lot of industries in our town that still relied on them, so they were churning out programmers that could actually apply for those jobs as the older programmers were retired.

COBOL was fine, ultimately. Clunky, but functional. CICS was less fine, but still something you could adapt to. JCL was _miserable._ I honestly cannot remember why, I've blocked as much of it from my mind as I could, I suppose, but I remember every part of JCL being awful and no fun to work with.