One question is: how far has COBOL been extended, if at all, with modern features? Other languages have evolved to add features from (or benefits of lessons learned in) other languages -- has COBOL? (I honestly don't know; I stopped working in COBOL in 1986, and that environment generally required writing code backward-compatible with the ANS 1974 standard).

Generally, there is a risk of being pigeonholed when working in an "old" technology, so be observant of that.