I think parent and grandparent just operate in different sub-industries/geographic regions etc. I find it easy to believe that some communities find linkedin in

I think parent and grandparent just operate in different sub-industries/geographic regions etc. I find it easy to believe that some communities find linkedin indispensable while some consider it an anti-signal. I also find it strange that while you clearly know that over-generalizing your own experiences shows that one "only knows about the bubble that one operates in", your first sentence is that you can't believe people don't use linkedin...