An interesting comment here.
I can attribute jumping several economic classes to the social skills I honed in high school and college. I have many friendships that are decades-plus and I had 150+ of my invited friends / family attend my wedding.
Emotionally, I do not long for new friends. It's a lot of work to maintain the relationships I have with my friends, family, wife and daughter.
I find aimless socialization these days to be laborious. I just do not give a shit.
I recently moved to NYC. I am at a point in my career where it's networking and politics that will get me ahead. I see a lot of my net-new socialization moving this direction.