If the company offers no real growth technical, responsibility or compensation yes

Don't leave a good place because of FOMO.

I have worked 5+ years at my first work place. Good WLB, growing skills, promotions, good people. Most people who left tried to come back.

Why do you think staying can cost you career advancement wise? What are your goals?

What is unusual about your current position? If your current position is very nieche or skills are not transferable, that could become a risk for your career.

Feel like you only received half of, possible good, advice:

I used 'two years, up or out', in my career. Who cares if you work somewhere for a longer period of time as long you keep progressing in all the various metrics of career progression?

It's when things become stale that out is a good idea

2 years are a bit extreme. I think 4-5 years is a good option. But if only if I don't like the company (culture, people, policy, etc.) or I don't see any advancement in my career.