I am not as old as you are, but I have had my share of using pre FB social medias. I don't know but for some reasons, I never like and enjoyed them. May be that I found them to be addictive and left them, because that's one of my life principles not to fall prey any addiction.
However, the case with SN, as I found out, is very different. Now, I'm in my third month with SN, I never felt that I am getting any addiction for it, instead I am grateful because I can learn a lot here and TBH can stack sats.