It is incredible. Sustaining 15 years at staff level will cost you a lot in other ways though!
Sustaining 15 years at staff level is near-impossible and will extract a heavy toll for the vast majority of people. Plus at 55? Not saying you'll be dinged purely for your age but it's not like it has no influence ...
Yup! Depends on the company and the person, of course.
Another thing: People at FAANGs usually ride the stock up and get way more than 7% per year. I'm embarrassed to say that I sold a lot of MSFT stock at $30 in 2011. Today (~15 years later) it is trading at $530.