> COBOL and 4GLs in general
COBOL dates back to 1959, much earlier than 4GLs, and the cited 1992/1999 articles make the point that 4GLs were poised to replace the likes of COBOL and FORTRAN when in fact those dinosaurs, or rather nautili since still living, turned out to outlive 4GLs except SQL (when counted as 4GL).
Arguably, Python is what 4GLs turned into or were supplanted by.
Informix 4GL is still alive and well (somewhat, anyway):
https://en.m.wikipedia.org/wiki/IBM_Informix-4GL.