Most companies are the same and have very little differentiators. Working at Google or Facebook is the same. So jumping around makes sense since that improves s

Most companies are the same and have very little differentiators. Working at Google or Facebook is the same. So jumping around makes sense since that improves salary a lot more than staying put. Every now and then you do find a company which has no alternatives like SpaceX or Renaissance Technologies or Steam. People don't leave those easily.