Any INTPs here whose main interest is Philosophy?

Asking because there was this one INTP I got along very well who was into Philosophy, metaphysics specifically. We got physically separated due to something outside of our control after I got to know him, but since then, I never got to know an INTP who's mainly into Philosophy.

The ones I got to know through this sub are mainly into science/mechanical stuff, but it was those convos about human nature, ideal society/family units/groups that I really liked about him.

So yeah, Im curious if there are other INTPs here with that main interest, or is that a rare topic for an INTP to specialize in? I don't want to divulge here the exact problem that guy was trying to solve but Im just curious if there are others here who are mainly in that realm.

For context, that guy and I are in our early 30s and Im INFJ.