I mean, working this long anywhere will make you a millionaire, but also keep in mind things often happen in 20 years that can cost a lot:

Caring for sick parents/loved ones

Your own medical/etc issues

Kids

Divorce

Market changes etc

I mean, without getting into my personal life, for example, , google gave options and not equity for years, and there were times those options were underwater, etc.

So it's not all just raking in money hand over fist.