I'm jumping in here because I'm shocked to see such high prevalance rates. I have pretty rich life experience. I know people from all walks of life. This pwBPD who I've known for the last year? I have NEVER met ANYONE like her. She is something else. And btw, I've worked with a TON of trauma survivors. This is the first severe pwBPD I've ever met. No way is it 6% of the population. No way.
I was married for 12 years to a woman with BPD; she is pretty much a textbook example, with very extreme behavior at times.
Before we were married, I knew her for many years - worked with her - had a lot of the same friends. It never entered my mind that she might be mentally ill!
BPD tends to show itself within intimate relationships - spouses, siblings, kids, parents. Not so much in working relationships or among friends.
If you know 100 people, maybe 6 of them do
have BPD...but don't show it outside their homes...