If you look at the increase in total market cap of tech businesses over the last thirty years, it makes a lot of sense that there just wouldn't have been nearly

If you look at the increase in total market cap of tech businesses over the last thirty years, it makes a lot of sense that there just wouldn't have been nearly as many people starting their careers in tech thirty years ago as there are today. Also, people tend to go into management as they age because managers are generally better paid (for whatever reason). When people decide to not go into management they often stay on the projects that they helped to build, so you have whole teams of older engineers. I saw this when I worked at AT&T - almost everyone was older.