The only real answer is "I expect to have grown and matured in the role to where my colleagues find me an invaluable asset and even other departments seek me out as a problem solver within my realm of responsibilities.
It tells management that you want to stay in the role, so they don’t have to hire someone new in 2 years, yet hints at ambition to excel as a good employee. Yet not overly ambitious to get promoted or threaten anyone in the interview.
It’s an interview. It’s no place for honesty.
The only real answer is "I expect to have grown and matured in the role to where my colleagues find me an invaluable asset and even other departments seek me out as a problem solver within my realm of responsibilities.
It tells management that you want to stay in the role, so they don’t have to hire someone new in 2 years, yet hints at ambition to excel as a good employee. Yet not overly ambitious to get promoted or threaten anyone in the interview.