I'm 41, so not a millennial, but I do switch jobs often. I don't consider this a lack of loyalty; I am loyal, but only while I work there. No, actually I still feel loyalty towards previous employers (if they were good, which many are), but my loyalty does not mean they own my life.
I've learned that the best way to get a raise is to get a new job. And I like a change of scenery and learning something new. But my father and brother have stayed with the same employer for all their lives.
Having kids does not mean I stay at the same job longer. It does influence my choice in jobs, however; I'm more likely to choose something close to home, and more likely to choose higher pay over interesting technologies or cool coworkers (though those are still big factors).
I've learned that the best way to get a raise is to get a new job. And I like a change of scenery and learning something new. But my father and brother have stayed with the same employer for all their lives.
Having kids does not mean I stay at the same job longer. It does influence my choice in jobs, however; I'm more likely to choose something close to home, and more likely to choose higher pay over interesting technologies or cool coworkers (though those are still big factors).