> I don't understand this "be my true friend or screw you" advice that is repeatedly given here.
That wasn't the advice. The advice is that if you want to maintain a relationship with someone, make a little effort to do so. Social media has made people ultra-lazy.
> Am I supposed to call them on the phone to get a verbal update on their life, or they are not my "true friends"? Have 1:1 sessions in Signal to discuss what exactly? Their Facebook photos?
I mentioned email, but your reply mentions everything except email.
Anyway, as far as what you're supposed to discuss, yes, you'll want to get an update on their life. "Hi, wondering how you've been. What's new with you?" Not that difficult.
It's almost as if social media has created learned helplessness, and we've forgotten how to be human.