It’s worth noting that one of those organizations is IBM. Mostly relevant because they’re the ones that originally built a lot of that cobol, the mainframes it runs on, and even the compilers that compiled it.
They’re basically the people you would expect to be able to do it, and they pretty quickly determined that the cost of a rewrite and handling all the downstream bugs and quirks would exceed the ongoing maintenance cost of just training new cobol developers.

My dad was a cobol developer (rather, a pascal developer using a compiler that transpiled to cobol which was then linked with the cobol libraries and recompiled for the mainframe), and before he retired they decided to try to replace everything with c#. Evidently a year later their system still took a week to run the nightly reports and they had rehired his former coworkers at exorbitant contractor rates.

It does work there. The unfortunate thing is that so many sites change their login structure often enough that it no unusual to discover that a site just changed again and you need to update the list.