Sure, and I know someone who got like 80k inheritance and he bought a jet ski and a car, crashed the car and sold the jet ski within a year.

Not all developers can retire within 25, but what I'm trying to say is that a significant fraction of EU developers can, if they learn and are smart about their money, either retire very lavishly at the normal retirement age or retire 10-20 years earlier with a bit of luck/extra effort.