The idea that large corporations are simply going to move on from COBOL is out of touch with reality. It really can't be overstated how deeply old COBOL programs are embedded into these corporations. I worked for one that had been using them since the language itself was created, and while they all could see the writing on the wall, the money to do the change simply wasn't there. Not only would they have to do a code change, they would also have to do a hardware change because all of this is running on mainframes. Not only does this cost a lot of money, but it would also take an enormous amount of time. What mid-level manager is going to stick their neck out and push for this? What exec is going to ignore the guaranteed transactions that a mainframe and a decades-old COBOL program can offer simply to secure a solid future for which they may not even be around for?

But as far as training people to handle COBOL, well, that's simple. Look at vocational schools of years past. Why can't you train a random person just how to do COBOL? They don't need to do object-oriented programming or UX theory. They just need to maintain and occasionally update some ancient program that's been rock-solid for longer than they've been alive. It doesn't take a genius, it just takes very specific training. And there are a lot of people that would jump at a chance for some high-paying, steady job that they just need to train for a year or so at night school.