Just watch out that they dropped their poor friends for the reason everyone expects.
I don't give a fuck if someone is rich or not, and I have a number of poor friends[1], but I made the conscious decision to cut out friends that I wouldn't befriend if I met them today. Many of the people I cut were poor, but it's not why I cut them. I cut them because they stopped growing after or during highschool. When I talk about politics or society I don't want to feel constrained. I don't want to have to explain things like the catch up effect. I don't want come over with an expensive scotch and have people mix it with Coca Cola.
I understand that labour mobility and the internet have lead to a fracturing of society into different enclaves of intellectual and (usually) fiscal subgroups, but I don't want the only reason I'm hanging out with former highschool friends to be that I read Coming Apart and I'm worried about social cohesion. It's too high of a price.
[1] Most of them are either PhD candidates or in a profession that they love that just generally doesn't pay well, like Singer Songwriter. To me and I feel to most people that cut their social group sometime in their 20s or early 30s class or culture is the critical distinction, not wealth.