I have thought about this problem a lot in the past and I feel the older you get the harder it becomes to make new friends. If you have moved to a new place then you loose all those connections slowly and it's a challenge to make new friends. At least that's what happened to me. And on top of that your financial status that defines who accepts you as a friend. Also how much you can afford and are willing to invest to…
While that's true, at least for me you also end up with some deep deep friendships that easily survive years or even decades apart, which are closer and more meaningful than most of the friendships with people you see daily/weekly.