To represent the other side of the coin…
I never changed my major in college (Computer Science) and still work at the same company that hired me when I graduated. The only “career change” I’ve made was cutting my hours when my children were born so I could spend more time being a mom. 
(Best career ever!)
Oh, and I’ve been married to the same man (we met right after I graduated college) and lived in the same house since we got married.
Same job, same man, same house…Depending on your viewpoint I’m either very loyal, or just plain boring. LOL!