My dad was the same - he literally wrote software for a computer that hadn’t been built yet. That’s just such a foreign concept to me. But in his last years he was barely able to use a web browser despite the fact he spent nearly his entire adult life as a developer. I don’t know if the slowdown comes first or if it comes after retirement but it frightens the hell out of me either way. And it is probably the thing that I most think about when policies like UBI are brought up.