Expats 40+ living in a foreign country with a foreign partner, how do you feel?

As per the subject, I have a question to expats 40+ living in a foreign country with a foreign partner.

From my observations I know, that while you are young it is OK to live in any country with a partner of any origin, provided there is chemistry. 

However when people get older they tend to want to live in their home country and with a partner from there home country. You seem to need this local energy, when you get older.

And whilst  it is probably OK to live in foreign country with your local partner or in your home country with a foreign partner, I am really wondering how people who live in a foreign country with a foreign partner feel, when they get older.

Hence this question.