In 25 years they'll still have 25-30 years of work left in their lives, and by then most of them won't have received any significant reschooling, and they will still be competing in a tech world, where 10 years ago there wasn't a thing called smartphones.
Some of them will do just fine. I know a lot of old programmers, but I also know a lot of former older IT employees who are spending their 60ies in the unemployment lines.