Quite a lot in salary negotiations. FAANG tend to down-level people from less prestigious companies. 5 years at a FAANG will usually land you a senior engineer

Quite a lot in salary negotiations. FAANG tend to down-level people from less prestigious companies. 5 years at a FAANG will usually land you a senior engineer position at other FAANG's, 5 year at non prestigious will land you one step lower. The difference is about $50-$100k a year.