Hi, OP here. No idea how I did it ten years ago, but looking at the Dunbar layer contraction, my active network (e.g acquaintances) peaks at 275 in 2016 and gradually declines to about 60 by 2026, and the close friends layer drops from 9 in 2016 to 5 in 2026.

Honestly, it sounds exhausting. Different strokes for different folks, I guess...