Why Ageism Never Gets Old
> In the nineteen-twenties, an engineer’s “half life of knowledge”—the time it took for half of his expertise to become obsolete—was thirty-five years. In the nineteen-sixties, it was a decade. Now it’s five years at most, and, for a software engineer, less than three.This sort of mythology is NOT helping. An experienced Software Engineer has valuable skills that do not age at all.  Yes there are new languages and frameworks we have to learn, but if we apply any effort (and we've stayed current over the years) that happens really quickly because we're just integrating all the knowledge we already have around a new set of features.