I see a lot of people in well-paying tech jobs moving around every few years--and not just because of companies going out of business or laying off people. I'm sure many have good reasons for doing so. But people used to stick with employers through thick and thin. I just saw a former manager who was with the same employer (through a couple acquisitions--and, yes, a couple years laid off in dot-bomb) for 43 years.
That's a small amount of people. Most people in life move from job to job by choice as they gain skills or want to try something else.
Track all the people you run into in a week, and consider how many you think would choose to keep the job their in with the same employer for life. I don't know anyone I can think of who would choose that.
There's just too many opportunities, at all levels, to find better jobs over a 50 year span.
