[Atlas26]

> From the individual perspective, staying too long slows down your rate of learning because you aren’t coming into contact with new people and technology at the same rate. Anecdotal, but lately I’ve interviewed some 8+ year tenured candidates that I wouldn’t rate above SWE II because it was literally a “one year of experience 10 times” situation. I try to change things up every 4 years or so to avoid ending up this way myself.

Should be noted, this is applicable to the same position specifically, not any one company. Some of the best engineers in the world have only ever worked at places like Google, Microsoft, an academic institution, etc, but they make sure they're constantly learning, working with new teams, switching to new positions once they've mastered their previous one, etc. In many cases these folks actually have a big leg up vs new external hires due to product and institutional knowledge, while also constantly learning new technologies.