TBF. This is because you only hang out with asian people. I live in the bay too and I don't know many people using wechat :|
A year after I stopped using Facebook actively, all of my friends have stopped hanging out with me. It's just me, my family, and my coworkers.
I hang out with "asian people" all the time, but I use kakaotalk because I'm actually hanging out with Koreans. Or I use line with my Japanese friends.